headless audio setup

Hi all,

A couple of months ago I picked up an 88 Chevy Cheyenne truck which is gonna be my sons graduation present in a couple of years once he's done school.

My plan is between now and then to fix it up and get some enjoyment out of it myself.

Being an old truck having a big shiny head unit sticking awkwardly out of the dash just didnt seem right so I came up with the idea of hooking an MP3 player to an amp and speakers and getting tunes that way.

So I went to the parts shop and picked up a Clarion Amp, 10" sub and 4 smaller speakers for the door pillars and dash. I now have all that installed and I'm using a regular RCA cable to plug into the headphone socket on my 120Gb Zune. It sounds pretty sweet although it would benefit from running through some kind of equalizer. Hopefully they will bring one out as an app for the Zune at some point.

The main reason for my post here though is to see if anyone knows of a kit that will allow me to plug my Zune in via a dock so that it will change at the same time. TThis way I can stealth in the connection so that when the Zune is not in the truck you wouldn't know there was a sound system installed.