i'd search the internet for many import specialists throughout the UK, see if they try and pass it off as a fresh import etc.. but if they are just chav theives then they wouldnt know what is aftermarket, so you may be lucky with what you find thorught the uk that has the same (which could be yours) and marks or dents in your bodywork will show you its your car. also check ebay, and autotrader, anything that could lead to your car deffo "enquire" about it to find out more. but i know how you must feel, my cousins range rover was stolen from outside their house a few years ago, keys went with it, wasnt seen again! but i wish you the best of luck and i hope to god you find your little motor.