Note that there are a couple different types of under bed carriers out there. I believe the change date is '51. My 50 does not have the type in fredoly's link. I have the one with a channel that allows the spare to slide down and out towards the rear. As with most folks I do not have all the parts as I understand they were kind of a pain to get the wheel back under there and therefore most spares got thrown in the bed and the hardware soon lost. I believe Jim Carter know sells repo set up for $250.00.