Jimmy the welder. He's in Long Island, NY.
He's a custom cooler/rod-rack builder and the stuff he makes is just exquisite.
His website, which right now features roof racks, is
http://www.rodvault.com
Give him a ring about custom cooler racks.
(516) 639 5549
He showed me a Vezco (i.e., another company) off-the-shelf rack that got completely destroyed on the beach. Blew me away.
Well worth the time and effort.