Gills, I've got a Evo IX w/ open wastegate that I could film for sound if you have a need for it. I could also get:
FD RX-7 w/ 13BT and stock sequentials
FB RX-7 w/ carb'd 12A, bridge ported
RB25DET Skyline w/ exhaust
Subaru STi boxer w/ external gate
2JZ Supra
I've got access to the cars so I could get whatever you needed audio wise. The Evo is mine but I'd have to borrow the others from friends.
Let me know and thanks for your contribution to the community.