Anyone know of a replacement CD changer that utilizes existing harness for 92 ES300 (Pioneer unit-trunk mount)?

Any suggestions and how to's will be greatly appreciated. I would like to be able to run it through my existing setup.

For the record, I also own a Jeep Grand Cherokee with the premium Infinity system (eight speakers, power amp, the works). I don't consider myself an audiophile but, the Pioneer system in the lexs provides equal quality sound as the Jeep. This is reason I want to keep my existing sound system.