Location: Bristol PA, on the Tidal Delaware River, Anchor Yacht club.
Boat: Oday 30, 4'11" draft
Don't matter who makes it, it only matters that is about the same capacity and refrigerant use. From the info you show on Denfender's site I'd guess it's too small a capacity. but it would probably still work 6 cu fit was what you had it sized for, the new one is for up 3.5 cu ft.