First off, won't your coach insurance cover this?
I had to have Thor paint a replacement outside heater cover since the original cover was wrong and the coach was still under warranty. I shopped around in SE PA for a body shop to paint the small heater cover and they wanted $1K minimum. Thor said "no way" so they painted one to match my old cover. Thor might be willing to paint a new door if it was a lock failure result. The latches on the storage doors do suck as I've had issue with a few. If your coach is still under warranty and a latch failed, I would go after Thor.
Tom and Lisa
2015 Challenger 37TB
2015 Ford Taurus toad