Porsche Motorsport may not sell the 997 steering wheels anymore, but we have them. 

This OMP Suede covered aluminum body steering wheel is the steering wheel. The wheel is designed with 0 dish.

This is the correct wheel that you need for your 997 Cup if yours is worn and needs to be refreshed.  It comes with the two red buttons found on the cup cars to be used for the speed and alarm buttons.

Reference 997.347.084.90.