There is a company in Australia, brown davis that make long range or additional fuel tanks ( including the 1500) that may be an answer. Might have to move the spare, weight considerations etc. Haven't dug into it until the beastie arrives
Pumps around here stop at $100 before it is full, so I'm good with 33... 2WD mode would be interesting, but on same strange level I'm glad they don't have it, I'd go through tires WAY too fast.