Personally I am not into personalized plates here in the UK as you really cannot personalize them like in California, and the cost is way too high for them as well.
My plate is not a personal plate but one that matches the car and will stay with the car. It didn't cost too much because it is a standard plate <two letters><two numbers><three letters> but does have some relevance to what the car is, a 2011 RCZ (XX11 RCZ):
As for exhaust systems for the car, as you all know we have them all at our site and also anything else for the RCZ:
http://rczperformance.com/
If you do not find what you are looking for, please let us know.
If you have any questions about what we sell, do not hesitate to contact us.