Here's what I did in a similar situation.

Like most good protestant boys, one my jobs in college was playing guitar for Roman Catholic mass at their student center chapel. We did 8:00 mass with "folk" music. The nun that directed the choir had some folk mass music, but most of it was really bad. I borrowed a hymnal from the Baptist student center down the street. It had lots of good music, a topic index to help the sister select appropriate music, and the music was new to most of the parishioners. We used it for years; I don't know if the Baptists ever got it back.