CJ, I bought mine from Summit Racing. They are the Ford Performance version for the S550. Used them to trailer my 350 home from the dealer. They work well and are still on the car.
However, they do not mount in the locations that you have in your pictures. They mount in the front where jacking rails attach, and in the back behind where the rails bolt on.
Great! Thanks for the replies fellas!The part number for the Ford Performance version is M-1700-M.