I would never go the 3d design route for several reasons. What I would go with is these guys in the link below out of the UK. Prices are very good and quality is top notch.
In pound
700 for lip
350 for skirts
I didnt ask about the rear as they dont have one made for the dual exhaust. Needless to say you are nuts to pay 4500 for the boys over at 3d design.
http://www.z4-forum.com/forum/viewto...p?f=23&t=47261