X300 nokia autolead ????

Hi all,

Does anyone know of any where I could obtain an interface lead for the X300, to connect my Nokia Clark car-kit in to the car stereo?

E.g. so the sound comes though the cars speakers and not a mono speaker supplied with the car-kit..

or

Has anyone successfully hard wired the car-kit speakers wire? Into the X300 stereo speakers

Regards

Derek