Greg PAW...
 

Christian told me to check with you on this. I need the Blue, Green, and yellow three piece harness for the Delta/Concert Headunit. Do you still have it on your parts car? If so drop me an email s4qtro@bellsouth.net

Here is a pic, borrowed from TighTT

<img src="http://images7.fotki.com/v113/photos/2/232908/1505563/IMGP1297-vi.jpg">

he is slow to respond to email.

check w/ your local stereo shops.
 

They have plugs that fit into stock VW radios that will also fit into the audi radios.

make sure you specify you want the factory side plug, not the wiring kit that plugs into the factory wires.

(they may need to special order it, because using the VW plugs aren't as common as a honda)