Hey all, while we were still stationary in Ohio, I had an accidental discharge of a firearm occur inside the camper. The round traveled through the AC unit and out. Upon inspection I found that the round did not hit anything. Except Styrofoam and the outer shell. Pure dumb luck. We are currently down south and using the AC and its been fine. My question is can I replace just the outer shell? My original manual has multiple model numbers. How am I suppose to know which model I actually have?