Update 2:
This one has been mentally in the works for a while, but I had been waiting on the resin I needed to arrive. So my problem arose when I used a Miata/MX-5 steering shaft combines with the sparco hub and wheel. The problem being that since I wasn't going to use any of the steering column controls, I would have any exposed steering column as well as no way of running a connection for the horn to the hub. The hub has a brass ring that creates a ground when the horn button is pushed. But the ring is moving with the wheel and there for has to have some sort of contact. So with the aid of one of my 3d printers and a bunch of black resin I designed and printed this out yesterday.
So 16hrs of print time later and $15 worth of resin, I've got something that fits perfectly and can house the wiring.