Bathroom wall trim repair

Son in law used the TM (2720, 2007 model), didn't hold the bathroom wall together tightly while opening, now the trim on the bottom edge nearest the rear bed is torn, and snags every time it is put up. Anyone have experience with repairing this, or even a source for the trim? Nearest TM dealer to me a couple hundred miles distant. My apologies if it is covered elsewhere on the forum, I've been searching (and getting sidetracked by other other threads) for a couple of hours and haven't found anything about this.

thanks

tim