I have some SST 80 parts laying around, but not the rubber air boot. You'll pay a lot for that. I've found some Yamaha boots that were close, but not correct. You can also search YF1 and YJ1. Let me know what else you're looking for, I might have it.
Here's a contact for some NOS stuff. I've bought a few parts from Jason.
Jason
GEMINI MOTORSPORTS, INC.
13720 Desmond St.
Pacoima, CA 91331
(818)890-2060