I had never heard of one until your question. It would be easy enough to build.
Be aware, though, that you're using reverse leverage to trade strength for reach. So it'll lift higher than before, but however much percentage higher it goes is the same percentage of strength lost. So if your 3 pt can currently lift... 300 lbs? Then you might lift a load twice as high, but your usable payload is now 300 minus 50 for the lift bracket equals 250 minus the reverse leverage loss of 150 equals "100 lbs". It might not be QUITE that bad, but your payload will definitely drop substantially. And below a certain threshold, it's just not terribly useful.