Alright, you should clarify which shifter you have since the early MK6s were a bit different. If you have the button on the front, you can swap over nearly any front button shifter (Audi, VW, and DSG ones included).
If you have the sidebutton one, you can still swap it over to an Audi A3 DSG knob as seen in this link:
http://forums.vwvortex.com/showthread.php?3616710
That would be the safe alternative. Some have had success heating up the plastic rod and converting it to a "front-button" position. This is a possibility but it's an expensive fix if you break the plastic rod.
Shameless plug, but I have an A3 shiftknob for sale if you would be interested in it.