Headlight protectors.
As mentioned before, think about changing your tires to something that is easily obtained anywhere.
Went through central Australia, Via Oodnadatta, Mereenie loop, and other secondary roads in 2003. Had trouble locating a tire in Alice springs, was lucky that someone just purchased a new Disco 2 and was changing the tires for something more suitable for the conditions around the Alice, otherwise I was in for a wait.
I have a roof top and think it is fantastic, unfortunatley I have not mounted to the Disco (Had it mounted over the tub of a Navara) as now have a small caravan instead (family is getting bigger). Roof tops do add a fair amount of wait up top and do take up most of your space if thinking of putting any other gear up top. If I ever think about mounting the roof top back on i will probably forget about gutter mounting it but instead tie it into the frame.

