I ended up with (two) yeti 250 cooler's, a cushion is also available as an accessory. A buddy of mine is making me stainless steel chocks for a more permanent installation. Water proof, can be used as a cooler and make a great deck box. Cost is less that thousand dollars each, which is way less than anything that I could find, 5k. The chocks are not even needed, they don't move on the front deck, they have rubber legs. We were in 4 to 5 foot beam sea and they didn't move, every thing else did. lol