I've got stainless steel line for the front, with the bracket to add Tokico (gsxr) 4 pot caliper, brake pads for said caliper, and a kawi 636 master, if you are looking for brake upgrades.
I have a set of light weight forged aluminum wheels for Ninja 300 made by MOS from Japan. I also have a Starlane Davinci-S dash with the wiring loom already set up for the Ninja 300. I can give you pics and more details if interested.
I have a race prepped Ninja 250 with a motor that may be on the way to needing a rebuild/replacement. I'm pretty confident that most of the race bits are compatible - so much so that I'm in the market for a builder 300 to transfer the parts to. But, maybe you are interested in my parts/bike. 2 sets of wheels with rotors and tires (front used Q3 & new Q3, rear used Q3 and new Q5) Forks - Racetech emulators recently rebuild with fresh seals/bushings/oil by GMD Computrack ATL, 145lb rider Rear Ohlins Woodcraft clipons and rearsets with some spare bits Brembo RCS15 less than a year old Bodywork - not sure what kind and it is kinda rough, but passes tech with major track day orgs just fine (haven't raced it, but bike raced CMRA with previous owner) I have more spares too like gearing, gas tank etc if you wanted the whole thing. Let me know if you are interested.