I've had my ute for almost 2 years, and since I got it I've said I'll have to get a rubber matt, but still haven't got one haha.
As rum87 said, Clarke Rubber or similar would be the best bet, let us know a price if you get something from them.
IF you want el cheapo generic then head to supercheap. Universal fit rubber mat for ute $60 and SCA brand from memory. Had to get one so the dog didn't slide around and they are surprisingly pretty good quality
yeh i had to move some stuff the other day and oh my god was i scared **** sliding everywhere i have dints in the back under the rear window now ####en corner of a metal table bang big dint, ohwell haha il have to go past clark rubber maybe supercheap, i dont care if its not the best as long as it stops things for sliding thanks blokes, once i find some prices il tell yas cheers