I think I've seen someone do just that by cutting a hold in the front of the bull bar and running a large piece of metal through and welding it to the frame. That way there's no force against the bumper when used as a pull point and it won't interfere with the airbags if the holes are large enough to not drag on the bar in an accident (hopefully).
If you do a search you may find the thread.
I believe you are thinking of this Frame Recovery Point scroll down for pict.