Does it have a hull number on the transom? If not I'm not saying you can do this but a Mfg. plate from another boat that has since been scraped might get you further down the road if you know what I mean. No wait that doesn't sound legal. How about finding a guy in the white pages named Deaver and pay him C note to write you a note saying he built it for himself in his backyard? No that doesn't sound right ether. I know claim it was stolen twenty years ago, you found it abandoned 300 miles off the coast, statue of limitations have long pasted, and you claimed salvage rights on the high seas!!! there you go no problem!