You know, the best, easiest answer would be to call a FLM auto dismantler. They will(should) know if you can just get the harness....
Bud, there is only the "Full" and "Mini" changers(as per AllData) in 1998 Conti's. There is the regular CD head unit, but its a single disk. The Full changers sits inside the center console, the mini sits in the back of the console facing the rear seats.
Edit.......called the dealer, the CD changer harness is part of the radio harness WHICH is part of the entire dash harness. The changer part of the harness is taped to the dash harness so it IS seperateable, but NOT sold seperately. I'd suggest hitting the junk yard and bring a razor blade knife.