BMW M Performance DCT Shift Knob & Hand Brake (set) 51952411428
BMW M Performance Manual Shift Knob & Hand Brake (set) 51952420600
https://www.shopbmwusa.com/PRODUCT/5...AND-BRAKE-(SET)
http://www.realoem.com/bmw/enUS/show...diagId=03_3949
They do not have the part number just for the shifter. Unless you buy it from private seller. BMW will sell as set including the hand brake lever.
Takes u 15 min maximum to do the job.