Fanatec DIY Wheel Adapter & Plug with ball bearing mount
use the same plug top from the original and clamp
the edited plug bottom is for these pins
https://www.amazon.com/gp/product/B09BZ825J7/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
the spacer is for if you need the pins to be closer.
this is the bike clamp i used:
https://www.aliexpress.us/item/3256804999656519.html?spm=a2g0o.order_list.order_list_main.29.57dd1802hDkVaH&gatewayAdapt=glo2usa
the long one is 36 mm longer than the normal one
use a 5/16th in ball bearing