My well known local upholstery shop knew how particular I was and suggested using seat kits from GAHH incorporated out of CA. He showed me some of their products as well. They produce the complete seat and interior kits for our beloved M3. I ordered the front seat kits which include all bolsters, middles, headrests, seatbacks, and rear covers. In other words all material for front seats.
I dropped off my two seats yesterday and hope to have them back tomorrow evening. I looked at the materials and was very impressed. The stitching and material looks and feels authentic and the color is a match as well. Total for the materials and labor will be right around $1000, I am anxious to get them back and installed. Check out gahh.com for their selection. Your upholstery shop should have their catalog too. (I have no afilliation, just passing on some great resources)
Oh, while the seats were out I decided to have the carpets shampooed today to really spruce up the interior. ///M is gonna be smiling soon.