We need to rip off the factory rear bumper and put an XJ style durango bumper. Then, you can have the everything you want atached to the rear bumper and still up high for wheeling. But NO, no one has made something like that yet unless it's all fabed up. It would be great to have the 2 cans, high lift, and spare on there off center and up a bit higher. Also, you can yank on that bumper as hard as you want.
http://www.durango4x4.com/rearbumpers.html
http://www.durango4x4.com/images/gallery/Elliot02.jpg
We need to make something similar to what they have and keep it low profile and close to the truck and not weigh 500#'s