I would not believe any published spec of any kind on any import tool site. This includes not only compressor airflow, motor HP, torque ratings, strength ratings, winch line pull, or anything else
Can you fabricate? I'd guess not from your post
Maybe find a "car guy" who CAN and who is willing to help you
You MIGHT be able to use the HF bar as a starting point, modding the rear.
WHAT I'D DO if I just "had" to do this............
Have some sheet (flat plate) meybee 1/4" cut that you can drill and slide up between the front frame horns and bumper brackets. These do not need to come down "where you can see them" just drop down behind the bumper. Drill them of course to fit the frame horn, and drill one hole in each on the bottom edge which will fit the tow bar
Make "stronger" mating L shaped brackets which will form the ends of the tow bar to "reach up" and meet these brackets with, say, 5/8 bolts. Use whatever lock nuts, safety pins, etc, these will be the "up down" hinge point of the bar. Maybe use? 5/16? flat plate, or angle, etc. Use your head.
Now fab these L brackets as necessary to adapt to the HF bar, and add (weld) brackets near the bumper for a cross -- brace that bolts up
You can still fold the bar by unbolting one end of the cross brace
Don't forget you need LIGHTS. as in tow lights
One easy way to do this is to rustle up a spare kick panel connector for your rear harness. "In about a minute" you can unscrew the left kick panel, add your adapter harness in place of the dash harness, and run the temporary cable (which you have made) out the vent window and up to the tow vehicle. A couple of towels taped around the cable will protect the paint, etc, use your head
THIS WILL NOT work well, if you have the new "amber turnsignals" unless you get a 'converter' box for the hookup, or maybe your tow rig has this built in (My Ranger does)