a couple weeks there was a guy up in new england that had a side delaminate and I think it popped out of the corner molding. he was repairing it with epoxy and you press boards up against the side, putting pressure on the fiberglass from a tree or something as the epoxy dries. But there was a storm comming and he was delayed taking the boards off and I never did hear the end or see final pictures.
I have a 2011 open range roamer with similar damage and looking for a solution. Manufacture offered to fix it for $28,000. they wanted to replace both sides to fix it. but camper is only worth $15K trade in with no damage.