I have an illuminated shift knob off of a '99 M3 for sale on ebay, the wires are a little damaged but the illumination still works, there's no reserve and the starting price is $12.00...
http://cgi.ebay.com/ebaymotors/ws/eB...RK%3AMESE%3AIT
http://cgi.ebay.com/ebaymotors/ws/eB...RK%3AMESE%3AIT