A few interesting items available in Australia for the R51. I would imagine they could be installed on our Pathfinders as well, although it might involve a few emails & forwarding of photos. I was trying to source a Nissan parts department in Oz with an online catalog, specifically for the head...
I have re-done seat covers in the past - all you usually need are basic hand tools, some new hog rings, and hog ring pliers, but......I would NOT mess with a seat with a built in air bag, I think its best left to a professional
I have hiked and camped there, and it shows up on a lot of Jeep forums as a place to go, I'm going to email them tomorrow to see what the actual deal is regarding off roading