I found the seat backs on eBay for half the cost of new and scoured over the pictures to find ones without broken clips. They both arrived with broken clips. Refunded through eBay and bought new through FCPeuro. Tried carefully to remove with appropriate tools, both retaining clips shattered and one clip broke on each seat back. Installed the lumbar support without any fuss and with new retaining clips the new seat backs snapped in and look great.
