I would bet that Catalina Yachts itself will sell you one. But it may be cheaper at an RV dealer, such as Lost Parent recommends. I personally think it is a rather flimsy excuse for a door & poorly built to begin with. If you do replace it, also replace the snap type closure as it will corrode & break off over time when fastening it closed. I would just remove it. It just gets in the way & is a nuisance. The only cabin door that is rather necessary is the one for the head, which thank goodness is at least made of real wood panels.