I have a 2001 A4 with Bose Audio. the wiring for the Cd changer is already installed; however, i already own an alpine cd changer and unfortunately the wires do not plug into one another. ive looked everywhere but cant find anything online for where to buy a changer adapter that would fit these specification. anyone know a company or website that sells this product.

 

Try asking here:Car Audio & Electronics

Or here:General Audi Discussions

Those guys are quite tech heavy on these kinds of things.