I have bilco doors leading to my basement from the outside with an entry door leading into the basement. The door is cut down and shimmed in with 2x4’s, and has random mismatched hinges bolted through it and basically is horribly done and not air right at all. I’m searching for a new pre-hung entry door but it has a rough opening of 72” x 35 3/4” and I can’t find any doors that short. Any suggestions?