Don't go cheap - I did and it was a big mistake - you want to spend bananas you'll get monkeys. Get it done right the first time you'll be much happier. Trust Me.
That seems like a dead link, even when replacing the (dot) with .look at www.uphoulstery(dot)com. I've bought two interiors through them and was pleased by the price and quality. Good stuff!
Are you looking to replace worn out seats, or just faded ones? These guys also sell dye kits...