Re:
I've got a few SRAM rear mechs, 9.0 (top of the line before xo came out), and a set of mat Hong half pipe grip shifters. I've also got a few xo rear mechs, what length of cage do you need?
I've also got a few 9 speed cassettes and chains as well, what sort of quality/model range are you after?
If you need any SRAM shifters, I've got some x9 and xo as well.