Hi, thank you.
I ordered the Steering wheel from Moto-lita. It's 13". It is a bit larger than the original. Once in the seat it's very comfortable. A horn plate over the center nut. The Caterham badge is just a hood badge that I glued to the horn plate. No issues with leg room and I almost never use the quick release.
Speaking of that, I had the guys at Hillbank-Superformace mount the new wheel to the quick release collar while they had the car.