We found Sign Pro in Logan, Utah (435 755-6940), doing a number of Jeeps and other 4x4 vehicles, along with police cars, emergency vehicles, and construction vans. They can put any design or photo on a wrap and apply the tough material over the whole vehicle, or just parts of it.
Here is a wrap Sign Pro did on one of Mount Logan Off-Road's JK Wranglers. The toughness of the wrap is impressive. We also like the idea that, once we're tired of a design, it can be replaced with something else.