@braxton357 @jeepinmatt many folks built all the need equipment for years. Until the recent only a few companies made equipment. All where really high end and very industry specific. Some make unit capable of holding ridiculous tolerances for huge stuff like power generation, steam, and the like.
China has caught up and making stuff for the masses. One or two are actually highly praised.
On the bar.....if I had the equipment probably. But the bar also requires the related set up bushings or (cones), bearings for the "carrier" brackets to allow the bar to turn free, and the appropriate bushes or adapters for the drive to turn it. At that point I'd buy it as a kit. I studied about 10 years on many machines and several publications on building it all from scratch.
My bar actually has a Morse taper on the end to connect another in line. The brand unit I'm running has a catalogue that rivals some Jeep upfitters!