Henri Potiron’s benediction accompaniment book is quite useful for me (and possibly others here) with the number of chants for which he wrote accompaniments. That plus the Liber Cantualis Comitante Organo and a good hymnal gets us 90% of the way there. For some reason, Jeff Ostrowski changed the scan that he had on Corpus Christi Watershed to an inferior one, so I am putting the original here.