Thanks Herman and Tom.
We looked at your links, but Skip is trying to find a non-salvage one before looking at salvage. He doesn't think they would want to unscrew the hinge instead of selling the door whole. I did look through and bookmark some of the salvage and used parts places from your links, but couldn't find a long hinge like that. I think we'll use a generic metal one. We were surprised that Roadtrek didn't have some kind of link to the manufacturers of the motorhome, who I would think would have some selection of leftover small parts, if not that particular one. Thanks again, and I look forward to corresponding with the group.
Wendy