Just a thought-
I worked as an RV technician for a while between construction jobs. If you have a dealership with a body shop near you I would stop by and speak with the manager and explaine the situation. They have a thousand different products i.e. trim, glue and stainless hardware. Better would be to drag it down and let them take a look. Information gained would be invaluable and free. The technicians get very board with the same ole same ole and I think that they would take quite an interest. Many of these guys also do work on the side i.e. paint, fiberglass and fine woodwork. Good luck! May the wind be with you!