you will find there are less "tuning shops" over here than in the US, and that there are far less turbo'd Zeds... the cost of the car over here is much higher and so is the cost of having work done on it unforunately (and the lack of experienced garages/shops)!
of course, a few have done it anyway!
being LHD shouldnt cause any major problems - plenty of LHD cars trundling around already! (european visitors/workers or imports).