I got one of these for my recently purchased 1999 Freelander, might be worth asking the seller if he has anymore. I got it to enable me to use the cd changer in the car, even had cd's in the magazine.
Dude sure all the original tape decks hook up to the muti-CD unit which would live under your drivers seat. I've seen one on EBAY the last few days, get yourself on and have a look, ask the seller for confirm or look in hand book if you've got one.