A good local locksmith can fix you up. Getting key copies is one of the first things I do when we buy a new rig. Keep originals in a safe location and use the copy. If you have a back and front door ask the locksmith to stamp letters into the key head like FD or RD to tell them apart. Ive also gotten other letters stamped to tell them apart from other campers I've owned. Nothing worse then finding a key in 5 years and wondering what it was for.