WW, first I would suggest you look at the thread on the Gospel Tape Lending Library-- maybe you want in on that?If you want a mix like ours, I'm afraid you may have to do what we did-- comb through seven or eight genres and pull what you like. There is one book Joe Offer has that we don't have yet that might get you a lot of them-- Lift Every Voice and Sing, from the Episcopal Church. It was prepared for use in African-American congregations and seems to have quite a few of what we'd found on our own. (See the Afro-American Hymnal thread for its table of contents.)
A number of ours are in our players' binders as words/chords-only, because we learned the melodies from tapes. I could send you a copy of the above material but it's in rough shape from multiple xeroxing. If you want to pick a few to start with and PM me, I can start scanning.
~Susan