Welcome to the forum. I see you have no responses so far so I would suggest that straightening a warped RV cupboard door is probably pretty hard to do. You could try calling Thor with your coach details/VIN and specific door that needs to be replaced and see if you can get a part number so you can purchase a new door through Thor's retail RV supplier in Indiana......or you could try an RV wrecker and see if you can find the same door/color scheme closer to home (and probably a lot cheaper):
https://www.rvbasics.com/techtips/rv...ent-parts.html