[JRTJH]

I have no idea how to deal with Keystone on this one.

As for the dealer having no clue how to fix it, it's nothing more than fiberglass. Find yourself a "competent boat repair service" They are "experts in fiberglass repair"... Remember, just as auto body shops are not all equal, boat repair shops are not all equal. So, do some research before you drag your trailer down to get an estimate.