As of this morning I've decided to go in a different direction in regards to my interior colors and am putting my one-day old black carbon fiber shifter knob up for sale. As seen in this thread:
http://www.e90post.com/forums/showthread.php?t=23396 I had to modify this piece to fit as it is not manufacutered to fit. After my modifications it fits perfectly as you can see in the picture below.
I paid $100 + shipping for this knob and spent over an hour and about $10 in supplies to modify it but I'll let it go for $100 shipped. I'll ship it via USPS Priority Mail (2-day air).
Let me know if you're interested. Serious buyers only!