Geektastic:
Another thing I have seen is leather wraps that you sew on yourself. These are often sold on Alibaba etc and can (apparently, according to someone who did it on a RR forum) actually be of reasonable quality. Maybe try that if it really bothers you?
I would ensure that the steering wheel does not have inbuilt sensors before attempting that. My new Kia Sportage EL has 'Keep Lane Assist' and knows when my hands are not on the wheel and tells me so.
