A few years ago, I sold OEM Matte and Brushed Chrome Illuminated Aluminum Shift Knobs. These were unique because BMW only sells leather and wood (limited choice grains) illuminated shift knobs... no aluminum. Also, I made mine light up amber, not red. I always thought red looked stoopid because it didn't match the dash. Anyway, I couldn't keep up with demand. Lots of people ordered but I had to turn them away.
Things are different now. We found a new supplier and have them CNC machined. (the last ones were machined by hand and it was one of the dumbest, most dangerous things I have ever seen.).
Here are the pics:
We have them on our website. You can order by phone or credit card. Most E46 and E36 BMWs are prewired, but we include scotch locks so any BMW can be retrofitted.