Steering Wheel Adaptor Question!

[scca vette]

I have purchased a aftermarket wheel for the restore project on my boat however the factory wheel is just bolted to the the shaft that is keyed.

I need to know is there a adaptor that I have to buy for the aftermarket to work? If so does Iboats sell it?

Here is the wheel that I want to install.

Here is the factory wheel!

Any help would be appreciated