There is Jubilate Deo, a Vatican publication. The currently available edition is probably a bit much to start. This thread - https://forum.musicasacra.com/forum/discussion/7448/jubilate-deo-editions-available/p1 has a content list near the beginning. May not be easy to get, here is a vatican source.
Laus Tibi, Christe has the great advantage of being an OCP publication! And the "advantage" of guitar accompaniments, which may smooth its introduction.
My CTS Missal, in England, has a section of parallel pages with basic sung Mass in Latin and English (not the same settings), do any people in your congregation use a similar missal, if so just bringing it to their attention might be a useful starting point. That Latin setting is available to print yourself in this pdf, if your singers are not familiar with it.
[ADDED] I also see this which may be the 1974 Jubilate Deo booklet.
[FURTHER] The copy from the link on this page shows the Jubilate Deo 1974, but not an elegant copy unfortunately.

The Jubilate Deo booklet is available from GIA along with an accompaniment edition.

MJO makes, indirectly, a very important point - chant is not just for Latin.

I would suggest also getting a copy of Fr Weber's recent collection in English - The Proper of the Mass for Sundays and Solemnities By: Fr. Samuel F. Weber O.S.B.. It gives four settings of each Entrance, Offertory, Communion, in different styles: complex/simple & based on Latin/English rhythmic patterns, and it gives psalm verses. It could be used to show people a variety of possible approaches.
If you are truly a small church, do not overlook that there is an official corpus of chants for small churches - the Graduale Simplex, and there is at least one version available in English By Flowing Waters by Paul F Ford. And, just to repeat an obsession of mine: had we started with the casting of the Graduale Simplex into English, edited by John Ainslie before the 1969/70 missal was promulgated, we would have saved 50 years of grief (and grievous damage to the Church).

I regret that I forgot to mention By Flowing Waters, by Pau F.l Ford. It is indeed a highly commendale resource. and I second Mr Hawkins's commendation of it. Also, additional to Fr. Kelly's excellent work is that of Fr. Columba Kelly, whose numerous works adapting old chant, and in the composition of new chant may be had from St. Meinrad's Archabbey in St. Meinrad, Indiana.

My advice may not be popular, but I just want to encourage you to move SLOWLY. Think of this like a 5-10 year project, NOT “let’s be singing the mass ordinary in Latin and all the propers by next year...”

I second Gamba's suggestion for the Parish Book of Chant. This is a small resource (only about as thick as a missalette) but still hardbound. The typesetting is impeccable as are the lovely interlinear translations for longer chants. Translations abound so no-one would be left behind.

It is worth noting that sometimes it's difficult to throw square notation in front of people right away; that said, they CAN do it. When we decided to do a plainchant mass setting, I transcribed it into modern notation, however, for the people in the pews. (I know, things get lost in translation! but as a first exposure to "the masses" this seemed necessary and it doesn't keep me from cantoring from square notes.)

Fr. Weber's propers are very palatable (Bartlett's Simple English Propers also, if a tad boring—but they are utilitarian and a great first step) and we have implemented them at the choir mass. Since my arrival last august, I now sing one of Fr. Weber's communion antiphon settings at every weekend mass (the nice thing is he gives options of varying difficulty, so in the case of my choir, I often pick option ii which is simpler since chant is still new to the choir) and we also sing the antiphon portion of the entrance antiphon at each choir mass as well (no verses). The response has been positive. If you email the publishers, they will cut you a deal when you buy in bulk, which helped us purchase 15 copies for the choir. Fr. Weber's propers are in English which really reduces any pushback from the choir or congregants. (I'll also add that for a while, I transcribed the chants into modern notation for my choir to start to learn the contours and nuances of singing chant before throwing squares at them. I've also started making weekly youtube videos à la: https://youtu.be/V8yAUDah7v0 to help my choir pick them up and have a resource for personal use outside of rehearsal.

One advantage to this approach is everyone is acquiring a pallet for chant, which permits me to sing more florid (Latin) chant during feast days without much difficulty. Whenever we have longer latin chants (or Sequences such as this weekend) I provide a half-sheet worship aid with translations which also helps. One last thing: make sure you do incipits right from the get-go so that people understand the concept of the solo-intonation to start; that way it's less of a hassle when you go to teach the whole congregation something like Ave Regina Cælorum.

that said, they CAN do it.

YES... they CAN! Don't dumb it down. Only dummies need dumming down, and God doesn't make dummies... dummies are a human invention.

What’s wrong with OCP Breaking Bread? I encourage you to become familiar with it before discarding it. It is a beautiful collection of chants, classic Catholic hymns, hymns adopted and adapted from the Protestants, and beautiful contemporary compositions.

I am the music director of a multicultural, small, older parish. There isn’t the talent to produce 4 part harmony nor can they read music. But they love to sing! We use OCP Breaking Bread because, in part, it conveniently contains all the readings and sequence for special Masses such as Easter Vigil.

I was an altar boy before Vatican II. I have a deep and special affection for the TLM. As a result my tendency is toward the middle-to-classic side of hymnody. After the chaos of the 60’s and 70’s, I believe our contemporary catholic composers have produced beautiful and fabulous works. While the Catholics have borrowed a lot of traditional Anglican hymns, the Protestants have conversely adopted Catholic hymns. I love the blending and the resulting rich library of hymns at our disposal, much of which is included in Breaking Bread.

For the Christmas Eve and Easter Vigil Masses, we sing the St. Basil Latin Mass. It is a legacy Mass setting for our church. It is melodic and beautifully composed with contrasting solo parts. The parishioners have become sufficiently familiar with it that they have no problem singing along with the handed out lyrics. And the solo parts make it that much less Latin for them to sing, but not enough to feel excluded and detached. Families have even requested that this Mass be sung at their beloved’s Reguiem.

Breaking Bread contains the Entrance and Communion Antiphons. Many, if not most, parishes do not chant these antiphons as preferred by the General Instructions of the Roman Missal. At different times during the Liturgical calendar, I will chant the Communion Antiphon in the key of G minor. Then I will follow it with an organ solo drawing from our Church’s rich collection such as Mozart’s Ave Verum, Veni Creator Spiritus, Pange Lingua, Tantum Ergo etc.

CG-Z and MJO make excellent points. Blessings to all!

CO, you are fortunate to have the resources where you can produce your own hymnal. Most cathedral churches such as yours have paid full time directors of music and organists. Some even have paid assistant directors and assistant organists. In smaller parishes such as mine music is supported by unpaid volunteers. With full time careers we don’t have the additional time necessary to pursue the finer and more academic points. Moreover, our parish budgets are insufficient to produce a crafted weekly worship aid. Given our meager and limited circumstances, Breaking Bread is a blessing.

OCP : Liturgical Music :: Easy Bake Oven : Cooking

To Jackson's point, why aren't our environmentally conscious bishops encouraging the purchase of, say, Missals which are on a one year cycle, and music aids which won't need to be replaced so quickly? And, while we're at it, pipe organs instead of simulacra (and un-necessary carpet and amplification systems?

I'm in a similar situation. We are approaching our transition with a "hermeneutic of continuity", building from the selections available in Breaking Bread. My parish had a chant workshop using the Parish Book of Chant, but rather than use two books during mass, we have chosen to use the OCP Choral Praise book and insert the Laus, Tibi Christe pamphlet in the sleeve of back cover. This gives us the ability to work slowly adding harmonies on hymns we already know as well as start adding chant. We have chosen to use a formula where we stick with Breaking Bread material as much as possible with the exception of a second communion (meditation) hymn. I've attached a list of our selections for Corpus Christi.