An observation about the jerry can mount that the O.P. asked to be identified - if you look closely at the photos of it, you'll notice that the spare carrier that's installed with it carries the spare offset to the driver's side of the Jeep, which also allows the jerry can to be mounted further towards the driver's side of the jeep, giving tailgate plenty of room to open without the jerry can hitting the passenger side tail light.
Next are some photos from a thread where someone welded a jerry can carrier to his factory hinges. Notice the jerry can is a lot further to the passenger side of the jeep than the one in the photo above.
Also notice the tailgate is only opened 90-degrees, it isn't opened fully. That's because if it is opened all the way, the jerry can will crush the tail light.
The jerry can mount the OP is asking to be identified is designed to work along with that specific spare carrier so that the jerry can can be mounted further to the driver's side so it doesn't interfere with the tail light.
Mounting a jerry can to the hinges, along with the stock tire carrier can be done, but it requires a stop to prevent the tailgate from opening far enough to crush the tail light.
Just FYI.