I have a 2004 blazer with gray cloth seats but the side bolster on the driver side are toast. I've looked online but can't find stock seats.

Anybody know good websites for this? I don't mind doing some light upholstery if there's a kit with foam or something

 

"The Seat Shop" in Texas. Google it. Not cheap though. Exact match to factory upholstery. You can do just the driver's bottom seat foam and driver's bottom upholstery if that is all that you need. They guarantee a match. I know they don't show for the Blazer, but call them on the phone. If anyone can help they can.

I just did the front leather seats in my 2004 Avalanche - bottoms and tops (both sides) plus driver's seat foam. Putting them back in tomorrow.