I have a '91 Lund 18' Pro-V with a single aluminum console. There is a tackle storage unit on the forward side of the console that has an overlay door. Since the console slopes rearward, any rain or spray leaks into the tackle trays. The door is 7"X21". How can I add a seal to this door to keep the moisture out? Most Cabela's and Tempress hatch covers require 13" high to cover 21-24" width and I don't have that much vertical space.