Macht Schnell - Competition Liteweight Floor Mounts for Racing Seats, Black
Anodize - e8x 1-series, e9x 3-series (including M3)
They were used to mount my Recaro SPG seat. They worked great. Unfortunately, I have gone a different route with the seat and now have the mounts to sell. They have a few minor scratches from the mounting but most of that will not be viable anyway.
$125 shipped. I bought them from EAS for $225 (plus shipping). Let me know if you are interested.