I'm a trained graphic designer if it's any help. Funnily enough, i've been thinking about some kind of club sticker recently too- i've been throwing a couple of designs around for a laugh and i've settled on one that incorporates everything, but thats subtle enough to be taken seriously (if that makes sense.)
If anyone could help, what i could do with is black and white versions of the GTI-R logo, and the round Nissan badge as they appear on the back of the car, and i can knock up my idea. (It's very stylish!)