You can't be far from a door--those trucks are everywhere. Try calling a few salvage yards a little further out. Try eBay (you might even get some leads on other near-by salvage yards through them).
I would think replacing a door would be a one-day (or less) job:
Disconnect electrical.
Disconnect the thing that holds the door open.
Pull pins (might be easier to disconnect brackets, not sure).
Assembly is reverse of disassembly.
