I've got a CD unit for an 02 - only the late 04/05 cars had the aux in (sometimes), its pretty rare.
£30 if any use.
Not 100% sure Chris, they kept offering cassette units right up to the last 46s and I've pulled CD units out of all ages of them but that's not to say they couldn't have been retro-fitted into an earlier car as they all share the same plug / wiring (up until the aux-in units anyway)
Dungannon