Have people come across companies that specialise in tuning cars on the 'highstreet'?
We have one near me in Norwich, called SCA Race and Rally, and all they do is sell big wheels and LED washer jets (and the like) to idiots. Mostly seems to be Peugeots and BMWs in their carpark (I buy our racing brake fluid from them, and they looked dumbfounded when I said it's for a racing car - they sell it for road cars!!!! How dangerous is that!)