Sorry your signature does not show where you live but SMB pulls quite a few stock Ford bumpers off their rigs. I've seen piles of them in Fresno. Don't have a clue if they will sell you one on the cheap. So if you live close maybe it might be worth a call.
2006 Ford 6.0PSD EB-50/E-PH SMB 4X4 Rock Crawler Trailer
SMB-Fresno will sell you a take off rear bumper if they have any. That's how I got mine. I had the super common contour bumper and replaced it with a take off rear step bumper. They'll also sell you stock tire/wheels. Common sizes are 225/75s but go for the optional 245/75s.