After market is tough since all of these boats
are not exactly alike. Your best bet, I would think, is to call Catalina and ask them if they can fabricate one to fit your lazarette. We opted for the cushion since we wanted closed-cell foam cockpit cushions anyway. We have, however, asked Catalina to replace our water-logged lazarette hatches. Their cost is around $340 each and we have to send them the old ones so that they can make an exact match. Hope this helps.