Audio Systems: dvd system for minivan, chrysler town and country minivan, chrysler town and country

Question
I have a 2011 Chrysler town and country minivan with a satellite radio and single cd changer with back-up camera.  The car has the space for the rear DVD screens (2) but I did not get the entertainment package when I bought it.  The dealer told me I could install a DVD player and screens later from a third party.  I am trying to find out if that is true and if you know any makes/models that will work so i can still have my satellite radio and the back-up camera will still display on the screen and of course my CDs will play.  If it came with a navigation system that would be a wonderful extra but is not necessary.  Thank you in advance for your help.

Answer
I own a 2007 town and country, older style with all the options no dvd
it was dificult ( BUT NOT IMPOSIBLE ) to go aftermarquet, so i decide to go with a factory unit i found the screen and dvd cd changer on ebay and the cables from the dealer, wire from the dvd to the monitor was $78.00 and the wire from the dvd to the factory radio was $40.00
this is for the power and the audio  it was easy to install and i got a pape shet with the instructions from my dealer parts department