Don't know if you've checked with Appalachee RV yet, but they are a great company. They do all kinds of repairs. I've used them a few times, from roof repair (leaking under satellite dish) to body work (tow truck backed into my front end). All the work was excellent.
Appalachee RV
1364 Duncan Lane, Auburn, GA 30011
(770) 868-0999
They have a pretty good website that might be helpful.
Good luck