At a guess no-one has any for sale buddy you might want to check the member traders on here such as tarmacsportz. i am sure they could advise on costs and stuff like that, also turn around times and the likes..
You might have problems if you took your car over there though sorry couldn't resist buddy. As above the car looks stock really, you shouldn't have any issues.
Welcome back buddy. I tried a Z4 convertible and banged my head getting in it so steered clear of those and i am not tall really only 5'10" in cuban heals
My brother has an M135i BMW he loves it! Its proper quick and he can get over 40 to the gallon on a run so also quite good on mpg also. I am not much of a bmw fanboy but it is a lovely car.
Maxton Design stuff seems good quality for me, I have their spoiler extension on my 370Z. I love it. @14N also has some of their stuff on his car so i am sure he will be along soon to give his opinion...