If one was so motivated by the quality of the leather in their car they could employ the services of a custom interior shop. You could then have the seats covered in whatever you wanted. If you shop around for a skilled shop most people would never know that you had anything done to the interior of your car other than the really nice leather.

With the cost of wiring harness and A/C evaporator job you would have more than enough money left over if you bought a late model car and had this done