The impression that I get is the ONLY option you can not get on the SR5 is the XREAS. The dealer has all the other options in house if you would like to have them added. I know it was around 1800 dollar option for the GPS and Backup camera on my 4Runner through www.davidmaustoyota.com I didnt check on the heated seats but I'm pretty sure you could get it. If nothing else, if you have the time have it custom made in Japan, would take around a month and a half to get here is what I was quoted. I've been wrong before, but if I am, I don't think I am, and that means my dealership is wrong too. Although both have been known to happen. Good luck.

Trevor