Usually that kind of compression means water damage in the deck under the mast, and that can be fixed--and routinely is.
So are you guys saying the B381 is built defectively and the deck compresses under the mast even without any water damage? Or, in either case, that there's some reason the B381 can't be repaired the way any other compressed deck would be repaired?
It sounds like this is just a question of "there's something wrong with this boat, let's figure out who's going to pay to fix it" and deal with it like any other repair. Either DIY or by a glass shop, it shouldn't be a big deal unless there's something really wrong with these boats.