[ARad]

The SC steering wheel "HUB" is bolt (riveted) on the steering wheel body as a PERMENANT fixture. Sounds like you are looking for a single hub such as a MOMO steering wheel hub that can be separated from the steering wheel in general sense.

Unless, if you want to buy a SC steering wheel just for a HUB removal as you can find there are plenty of those beaten up or junk SC steering wheels that are floating around on eBay for cheap and you can get the hub by removing it in your spare time.