I've googled and found nothing, but I find that hard to believe - yeah, there's a pun in there somewhere.
I just bought an old Grumman 17' canoe and it came with no title or paperwork. From what I have found so far, it's from 76 to 82 timeframe (based on when Grumman added float chambers and the earliest sticker on the boat).
I would think someone would have a site with hull numbers, deciphering what they mean and years for the serial number portion of it. Bit google has failed me if such a site exists - they are there for my old camper and lots of other things.