DIY door for a canned ham?

While I've seen DIY doors for teardrops, a taller door for a canned ham makes me worry about warping, etc. That said, I still really sort of want a better shaped door than the standard RV door.
Anyone built their doors? Wondering if I should weld a frame, insulate and skin... or am I just adding more nightmares to my complicated project?

While I might not be able to do the windows I wanted in the original pic above (The idea for those windows coming from http://www.vintagecampers.com/parts.php?category=Body%20Parts&sub=Windows -- I think that's adding too much trouble. Dang it.), it still would be nice to have the curve on the door. Might be bloody foolish, though.
Any thoughts?
Anyone built their doors? Wondering if I should weld a frame, insulate and skin... or am I just adding more nightmares to my complicated project?
While I might not be able to do the windows I wanted in the original pic above (The idea for those windows coming from http://www.vintagecampers.com/parts.php?category=Body%20Parts&sub=Windows -- I think that's adding too much trouble. Dang it.), it still would be nice to have the curve on the door. Might be bloody foolish, though.
Any thoughts?