
No idea what the proper name is for these things. Used to be very common on smaller oil field service trucks, often with two winches. One tied to the top of the a frame to lift it up and down, and one to the main lifting line.
Anyway I put a 9k winch on a fab fours winch bumper on my excursion and I could get some decent use out of a set up like this on my front bumper. 2 weld on clevis mounts, two 20' sticks of tube with clevis welded on both ends, bolt onto the bumper on the bottom, a big bolt through both and a snatch block up top, tighten the winch and lift the whole assembly before tying it back to the tow hooks on the bumper with a short loop of cable or chain, then use the winch as my main line.
I'm sure someone has tried this.