There are three bumpers that are made that are designed for towing; LoD Off Road and Rock Hard 4x4 are the two big players. Both back up their bumpers clearly stating that towing is approved. Every other bumper that I’ve researched will not state this, so its use at your own risk.
Rock Hard does make a Tow Bar Bracket for use with Blue Ox, Ready Brute and Demco tow brackets. This works good if your bumper uses pass through bolts. In this case just need to make sure the bolts you use are up for the task. My gut says a Grade 8 bolt should do the trick, but perhaps a Grade 5 would be fine.
LoD Off Road BumpersRock Hard Jeep BumpersRock Hard Tow Bar Bracket