I have a Momo steering wheel hub that fits E-28, E-24, or E-34 cars with production dates before 6/90. It fits a 17mm thin splined steering wheel shaft. I need the larger 21mm thin splined shaft for my E-34 M5 with a production date of 11/90. Does anyone have one to sell or is willing to trade the larger hub for the smaller one? Contact me at my private email, donmurrell@msn.com.