There are two settings of the Requiem in the People's Mass Book. Marier has lovely newly composed settings of the propers in HS&SC. And, if you must, there is a Gelineau-style entrance song (found in Worship III) coupled with psalm verses. Most GIA hymnals have an English In paradisum, and a strophic paraphrase of the Song of Farewell is set to a hymn tune in most OCP resources.
The chant propers are in fact found in at least the print edition of the American Gradual, although I seem to recall my copy has a printing error somewhere in the middle of that suite.
I have to apologize for letting this sit on my hard drive for way too long! The texts are mostly from the Gregorian Missal. I think that these are just fantastic. The Domine Jesu Christe and Subvenite are absolutely first rate.
Again, download English Proper Funeral Chants composed by Fr. Columba Kelly, OSB here.
I ran through Fr. Columba Kelly's setting of the requiem propers (see Adam Bartlett's post above) last night with a couple of singers and I recommend them highly. For those of us working in English-dominant and somewhat chant-phobic environments, these are a great resource for funeral liturgies. Check it out!
I have written and introit, offertory, and communion for SATB to be used at funerals that are in English. I am finishing editing them (As I have only used them for a funeral once) and could pass them along to you in the near future
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