There is a ton of music fabric out there. I bought a lot from keepsake quilting. Every shop I have gone into lately has it, do a search online for music fabric, you should get some good deals right now. They even have fabric with complete choirs in robes, piano keys, etc. Andover fabric site has some really neat free patterns, one is using their music fabric.
http://www.andoverfabrics.com/QuiltD...l%20Voices.pdf