For sure get some estimates from upholstery shops. I had my seat done by one and the total was only 300 bucks. That was for all new foam on the seat and the back too.That was for a cloth and vinyl mix. He covered the sun visors with the same vinyl for 15 bucks a piece too.

There was no way I could have done that cheaper myself.

Brothers Trucks wants 300 bucks for the seat foam only. http://www.brotherstrucks.com/products.asp?dept=547

The glass is twice as big as it needs to be.