I always buy my knobs from TSM. I've had them on my S2000, 08 350z and now my 370z and have the Gunmetal M1 Abrams coming for my 128i next week. These knobs are a must if you have a short shifter as the BMW knobs are junk. This alone changes the feel of the shifter by a pretty big margin. Highly recommended mod!!
I think you should change the title of the thread since not many people know about these knobs