Consider the G8 steering wheel? I have a spare one from upgrading my G8's to the GXP wheel and it's surprising the difference having the bigger grips makes not just holding the wheel but when aggressively driving the car. I'm sure it takes the same effort to incorporate it as a C6 wheel but I could be wrong, G8 is a bit upside down in everything I have discovered owning mine.
I guess an idea to throw out there a little too late huh?
I have a spare wheel from my car somewhere I believe and my extra G8 wheel, will have to check out the differences to make it all work and see if it's possible.