Rickochet Rick, that guy never made any pullers, that I know of! He has patents on a lot of things he's never made. He is the guy with the .....damn, the name escapes me.....but that computerized shaft alignment system that costs $50/per.
I had thought of building pullers myself, but just no time for it until I retire.
There is only 1 on the market(similar to the J😎, last I checked, and I hadn't checked in several months. There was a "Robert's" brand on Ebay, and also 1 from RJs. The RJs looks like a pain in the ass what with having to remove bolts to lock in the shaft; which can never be a good thing.