Hi: This was installed in my 914 when I got it and I reverted to stock OE steering wheel.
The car stopped running and was stored soon after the PO installed this. So FWIW, it's not seen much action. Zero scratches on the hub exterior.
Drilled and tapped for both Momo and Luisi wheels. Perhaps others? See: https://www.volantiluisi.it/en/about/
eBay has them new for $73.95 (plus tax) https://www.ebay.com/itm/233122274610?epid=...%3ABFBMls-qjqlg
$35.00 plus shipping
Thanks,
Ron
Click to view attachment
Click to view attachment
Click to view attachment