I've got the JCW aero kit and i just scratched the front splittler/lip so i want to replace it, but i cannot find the part number or a place to buy it online.

 

Not sure if you have the new or old splitter, but check out http://www.realoem.com/bmw/, it should help you find the part numbers.

 

If you want PM me...Im not sure which one you are looking for (I have the updated version on my car), but my Parts guy at the MINI dealer here accidentally ordered the old style JCW kit so I have an extra older style lip sitting in the shed.