I've found this on ebay. I had one in my Leon a few years ago and it gave the interior a more complete feel somehow. I'm tempted to get one for the A4 but just wondered what anyone else thought of them.
AUDI A4 A6 A3 TT S-LINE RS ILLUMINATED GEAR KNOB on eBay (end time 16-Nov-10 17:18:50 GMT)
I'm thinking of maybe putting togather a group buy together to get a discount if a few people like them.