Otay, then...
Yeah, like i said, you could get a donor chunk from a convertible door, but i doubt you could buy just the section from anybody, prob. the whole door, and, if you shipped it, that would get pretty pricey. Or.... you could just make a plate using a large nut welded to flat steel, mount that into the door. You would have to cut a "window" on the outside, make the inner structure, then weld the outer layer back I suppose.
Another alternative would be to just buy a donor driver's side door, cut out the innre section, and adapt it to the passenger door.
