yeah sony do one, alot more expensive though than a standard changer
(CDX-T69)
think the part no. is cdx-mxt70 maybe? been a while since i sold one! bear in mind however the standard deck doesnt understand MP3 so wont see folders etc, all tracks will be organised into one long list which means if you want to listen to the 745th track you'll need to press the skip forward button 744 times!