did you check what the OEM cost was? You might consider it. Some of the crap you get off of ebay will give you more problems than they're worth.
Yeah, 10-4 on that, that's why I'm asking for any previous experience. This truck is/was manufactured at a break point for parts changes in the rotors and calipers. Ford OEM Motorcraft stuff is generally at least 2x the cost of aftermarket, but if there's a mix up all I have to do is drive the part 1 mile over to Boucher.
Motorcraft set of rotors and calipers, loaded with new pads for the rear only, is about $450. Autozone rotors and pads only, no calipers but all the way around for 4 wheels is about $250. Time to get to work.