A number of years ago I ordered a direct, screw on shift knob for my Miata from this gentleman:

The Knobmeister

The quality was very good, and I believe he will do any color in metal or wood. They are weighted for feel.

This guy is big in the Miata community, so I'm sure he can make you a nice screw-on knob for the M3W gearbox.

Last edited by Crowbar; 22/05/13 11:42 AM.
1965 Plus 4
2008 997 Turbo Cab
1981 Alfa Spider
1954 Austin Healey 100 (SOLD)
2013 M3W (SOLD)