AFAIK, Softhut is out of SCSI chips - at least they were a few months ago, because they asked me if I had some in stock. I currently don't, but I have a few units being shipped to me. Since you're in California, and I'll be at CGE in San Jose next weekend, we could meet there.
I don't have the Buster, sorry.
If you need other chips, I have a healthy stock of AGA Lisas and 2M chipmem Agnus (8375) ;-)
Jens Schoenfeld