They will fit but check with Joe as per the quality. Not all of the Saleen wheel replicas are the same, nor is the build quality. If you end up with the wrong ones they will literally break within no time, as they are not meant for the Explorer's weight.
Make sure to call them and check about the weight thing, even though i just called, and got their machine, and i believe he's the same guy that sells them on ebay, and i've spoken to him before and he says they will work.
IMO you need a better, "normal" sideshot of your truck Ally to use. You need one at the ride height that your X is at right now, especially to add the airdam on as you requested, unless you want it into the ground