Sounds like Dennis Kirk, mostly aftermarket stuff. If you need parts for a Honda CB 750 use David Silver Spares in England. Or Classic Motorcycle Suppy out of the Netherlands (CMSNL) Both are fast and good. I ordered from David Silver. Had my part in 4 days! Z-1 Enterprises is another supplier. Oh almost forgot, North East Vintage Cycle NEVC sells CB 750 parts also.
I can see November from my house