oem cd changer to aftermarket deck

My girlfriend has a 04 neon with the a stock (I think its a six disc) changer. What I wanted to know is if anyone has hooked up the stock changer to an after market deck with changer controls. do they make a wiring harness for this?

i'm sure someone makes one somewhere, but i have a 2000 LX,w/4 disc changer, and asked about the same thing at the local audio place, he said "even if we can find one, it would be big $$$", so i said to hell with it, and just left the factory changer unplugged