Looks like nobody has jumped in here, yet, to guide you, so I will tell you what I know.
So far, I am not aware of anybody putting the '92-'99 seats in a '00+, even though I do belive it has at least been mentioned or discussed a couple of times. Bolt down pattern, seatbelts, and switches would obviously be the major hurdles. Not sure about color matching either.
BUT, as far as the heated seats, there are several '92-99 owners that have added the heating elements to thier seats, so we know that is possible.