CD Changer for 95 A6Q

["Levis-Fithian, Jeff E" <LevisJE@LOUISVILLE.STORTEK.COM>]

I just purchased a used (obviously) 1995 A6Q with the Bose sound system and
am interested in installing a CD changer.  A local stereo shop told me
something along the lines of "It's an Audi proprietary standard" and that
the only thing to do is to get a dealer to install one.  Are there any other
options?  I do not want to use the RF FM-radio reception option.  If anybody
could provide some input into my options it would be greatly appreciated.
TIA!
Jeff Levis-Fithian