00' Audi S4 with Audi Symphony

Hey guys, I’ve got a 2000 Audi S4 and I was hooking up a screen in my car so I disconnected my radio and when I hooked it back up, surprise! It was locked.. And of course the code isn’t in my manual like its supposed to be, so I went to the dealership and they are going to charge me $50.00 to get my code. I’ve heard there’s a way to get the code with the serial number and model etc If anyone knows how to do it I would appreciate it, it’s a Audi Symphony with the bose speakers etc my Serial number is AVZ524X0077129 And the other number is 8D0 035 195A. I’ve been without my tunes for three days now and my commute to work is an hour each way in traffic, I'm going crazy with no music… Any help would be much appreciated. here is a picture of the radio i have. http://www.ibiblio.org/tkan/audi/radios/symphony.jpg

I spoke with the Audi District Manager of my Area and he agreed to provide my code free of charge since i Have the Serial Numbers etc, Thanks for your input on this matter.