I built the tire carrier myself, I cut out and welded tabs to some Genright corner armor and used hiem joints for the hinges. Then I just built a frame that bolts to the four stock tire carrier mounting points in the tailgate. The frame takes all the weight of the tire, rack and gas can, the tailgate is basically just bolted to the inside of the frame and is the latch to hold it closed. The corner armor spreads the load between the stock hinge points, and the whole corner of the tub, I can sit on the tire while someone opens and closes the tailgate and there is no sag or deflection. Using the hiems top and bottom gives me up and down adjustment of the tailgate, as well as side to side. But since I set it up the first time during assembly, I've never had to adjust it.
I had another tire carrier, but I got really tired of having an extra step to get into the back of the jeep. This one opens with the tailgate handle just like it did when it was stock. I was actually so annoyed with how long it took to get into the back, that I copied J-Sherb's idea and built my own version of his soft top back window
Then I started to get carried away, I added a removable gas can rack to the tire carrier, and two mounts behind the tire so that I could use my interchangeable basket rack, or cargo box over the spare tire
After that, I built a set of sliders that had removable side mount jerry can holders. I have a jerry can toolbox that is really handy to throw in them on the trail and not have to listen to tool rattle around in the back. It's also nice to get a bunch of weight off the back of the jeep and spread around a little more evenly, you can really feel the difference when driving. The last step was modifying a 60mm ammo can to mount into my drivers side slider and swap out with the jerry can mount. It's a perfect place to throw tow straps, gloves and other small things like that. All in all this setup works really well for me and the type of wheeling I do.