Teardrops n Tiny Travel Trailers

I'm rebuilding the side door of my 6x12, and while I'm at it I'd like to change the trim. Currently the wood is captured on the edges by aluminum u-channel. I want to replace that with the style that overlaps the outside of the trailer. I'd also like to replace the hardware with some of the torx-tipped interior well nuts for security, but I can't find those either.

Where can I find this stuff? I've checked the usual sources and ome up empty.

http://www.rvsurplus.net/ hereis a place that has what i think you are looking for