My thoughts are it's an aftermarket piece/foregin truck part sold primarily in other countries...the Saudi (?) or something license plate was, I guess, what made me start thinking that way. The overly wide area for no purpose on each side of the plate looks to me to be "foregin" like the long plates for Germany, ect. Who knows???
I would believe a newer ('80's-'90's) stepside bumper from a Chevy or Ford...maybe even a mid-size Tacoma, Mazda or something could look similar.
What I would suggest when trying to figure something like that is to go to a busy parking lot & look for something that catches your eye. I've found that most people (especially truck guys) would have little problem with you measuring a bumper if you ask...probably most would hold the other end of the tape measure.
As far as the lights, I agree they look like the stock ones with "tuner" lens. Lorne