If I recall, Bechtold Library at the Catholic Theological Union in Chicago has many, many archives of Sacred Music. I'm not in the area anymore, but you might want to swing by when you have a free afternoon in the summer. I don't think they'd let you leave with them, but still . . .
they are off site about 2 weeks. Yes, they have to be broken down. It costs twice as much to do flat bed and the quality isn't as good. However, they can be taped back AND, most importantly, they are available to the whole world forever!
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