If no one can recommend a place, google RV repair for the area you will be in. Not a dealer but an independent RV repair, restoration, upgrade shop. Check their reviews carefully.
I almost ripped my rear cap off and did major damage it. Googling found a shop within a reasonable distance with lots of very good reviews. They even specialized in fiberglass repair so they could repair my cap instead of waiting months for a new one. Start to finish in 3 weeks (and that included being closed for July 4th holiday). Looked new again.
Bill & Patricia