05 dodge caravan stock radio/ dvd issue

2005 Dodge Caravan has a stock radio which has cd loading issues and before i can install an aftermarket deck,it has a factory din dvd player for the overhead monitor. Is there a way to install aftermarket deck and retain the use of factory dvd system as i havent come across a manufacturer(nav tv,metra etc)that makes an interface module. Thanks

At the dvd changer the wires are: Audio out r + = gray/white audio out l + = dk GREEN / WHITE Audio out common - = gray/orange constant + = gray/red switched + = dk GREEN/ gray ground - = gray black As long as you power it up you can use the audio lines to wire to an aux input of your aftermarket unit. Also I have video wire colors at the screen if you want to just add an aftermarket dvd nav unit and just have that be the main source and play it to the rear screen.Gary Sather