There are companies out there that will do the body work and essentially convert a regular F-150 into a Raptor clone. That being said, there are things that are absolutely unique to the Raptor that you can never do with any other truck. For example, the rear frame on the Raptor is very different from the standard F-150's including the TREMOR. That's because their suspension is totally different.
I don't know if these companies actually do all the work to change out the rear suspension to something closer to the Raptors.