It took me a little while to get around to mounting the rubber exhaust mount, but here it is.
The WARN bumper attaches to the frame rails with brackets. This is the left side:

As the bracket was in the way and the original All Pro mount can't fit with the bracket in place I decided I'd make a metal strap to wrap around the rail and then an offset strip to get the rubber mount positioned correctly. This is bolted to the frame rail in the existing frame nut:
Slightly different view:
It's not the neatest, but it does the job. Things like this make me want to learn how to fabricate/weld a nice plate mount...