Sorry to hear you got burned on the engine. Why don't you try to find a Pelican who has the doors available, someone known and recognized on this forum. Or maybe someone here who fits the bill can step up to help? Everything I've heard about rusty doors is that it's easier to find some in good condition used and repaint than fix the rusty ones (being an owner of such a door, attached to my car, I have a personal interest in the subject).
Good luck with this!