This is aimed at Northy reallly. How easy would it be for you to copy the Williams plaques in Williams 1's, but change the numbers to letters and sell them to members? I think for example, Martins car would look cool with a Williams plaque with 'Banana' on it. And danys with 'Silver Williams'
Just an idea.
Then the Williams 2's and 3's could have little plaques, but with the owners user names on instead.