http://www.ebay.com/itm/BOAT-TRANSOM...-/200823622232
Seems a touch pricy to me. I would make one from 1/4 thick plate. Bend it into the "U" drill a couple holes, buy a bolt nut washer and and lock washer and good to go. but thats me. You may be able to find a small weld shop locally to fabricate one but that will probably cost as much as buying on flea bay. ask your buddies, maybe someone is handy enough to make one for you then all it'll cost is a 6 pack and maybe a fishing trip. I could be all welded from 3 pieces or bent from 1 piece. Looking at it, it is made from 1/8" stock although I would make it from 1/4"