Join Date: Jul 2012
Location: Gainesville, FL
You'll need to find a used frame on the forums, ebay, or elsewhere, for obvious reasons you'll want an undamaged one. And you can get these for between 400-1000 depending on the year, condition, etc. Like it was also said, you can get a locksmith to come out and make keys for you, or buy a new lock set and install it. Honestly, even if the locksmith costs a little more, I'd just do that, because changing the ignition, gas cap, and rear seat lock is just a bitch.
Honestly though dude, depending on what all else is wrong with it, it's not really worth it if it's only a 3k bike. Your best best would be to buy it, get it running, screw the frame, and sell it as a trackonly bike to get some money for another one.