Need help with M-tec Steering Wheel

I need help. I purchased a M-tec sterring-wheel off ebay that said it fits E34, but when I went to change the steering-wheel the steering-wheel didn't fit. The hole on the steering wheel was smaller. What can I do to make it fit. Do I change the Steering column? And if so, which one do I use? A M3? I have a 1991 M5. I want to chnage the plain steering wheel into the Mtec Steering-wheel. The guy i purchased the wheel from in Germany says it did fit.

You should have gotten the guys number or something. No your probably stuck with it. Doesn't seem theres much help here. Try www.hotbimmer.net

E34 M5's came with leather wraped sport steering wheels. What did someone before you replace it with a regulaor one?