Thanks everyone for the replies. I am hoping that because so many F150s have backup sensors, even in Model year 12, that the harness is not unique to the raptor and I can tap or even plug the sensors into existing wires. Yes, I am thinking I can buy a 2013 bumper with sensors already installed at the very least.
As for why? I am a bit embarrassed to admit it, but I have become so used to the sensors in other and former vehicles, that I nearly back into things all the time. Lazy driving, I know. And then the other night, I was backing into a spot and there was a fire extinguisher box mounted out of camera view but enough to catch my bumper. Luckily I didn't scratch or dent it when I hit it because i was going so slow but it's just a matter of time. Depending on what it would cost I just want to look into doing it for the extra safety factor.