Have you tried Scamp
Not too far of drive, couple of days. They seem reasonably priced for the work they do and they would be very familiar with what needs to be done.
When I had work done for me, they had an Airstream parked out back, the tech that worked on my Scamp
said they had gutted it and were re-building the interior for the owner. I questioned him about doing work on other brands and he told me they work on ANY brand, time permitting.
Might be worth a call, and a trip, to possibly get an EXPERT repair.