I'm way late on this but I just wanted to add, for anyone who comes across this thread in a future google search...
Leatherseats.com will sell kits by row if you call. I believe it's $580 per row. When I did my truck I did the first and second rows but not the third, they tried hard to talk me into doing the third row too but in the 8 years that i've owned the truck i've used the third row seats 3 times, and that was in the first two years of ownership. Since then they've been used as a shelf in my basement. But they did tell me that if I decide to do the third row in the future that the kit would be $580, would have been only $300 if I did it along with the other two rows.