Keystone Bullet Premier

Welcome to all the new Premier family! It has been awhile since I've been on. Our camper is on a seasonal site for a few years now. It honestly looks as good as the day we got it. We noticed a slight leak in one side of our storage door. I know I mentioned this before and others have had this problem also. We are just getting around to maybe replacing the door seal. We have checked the camper for being level,tightened the locks etc. This doesn't happen with each rain so either a directional problem or runoff around the lip which doesn't make sense when you look at the door.

Anyone with suggestions on where or what type of storage door seal gasket to purchase? Thanks and Happy Camping!