It seems that Cartouche is part of Mac and they list only full kits in the catalogue I have. Are there other companies that make just seat covers for Model T's that I can contact?
Try contacting Elizabeth at Classtique Upholstery and explaining what you're looking for:
I installed all new wool carpeting including carpeted seat risers and kick panels 2 or 3 years ago. Every piece fit perfectly and am very pleased with the product from Elizabeth at Classtique Upholstery. The carpeting is normally part of her whole interior kit. My interior is in very good condition so she worked with me on the carpeting only. Sometimes she is a little hard to contact, so keep trying.
Thank you. This is of great help.