Someone on the forum a while back had his regular steering wheel replaced with an individual w/ wood trim. Stands out in my mind because I remember it being somewhat expensive since I believe the airbag module had to be replaced too. I think it was LovinM6?
2014 M6 Citrin Black/Champagne - 6MT, Carbon Ceramic Brakes, Exec, B&O, Night Vision, Driver Assist
2013 750i Mineral White
2011 750i Jet Black
2007 750i Monaco Blue