I have a 2004 dodge Caravan SXT with the factory AM/FM/Cassette/CD player. The only thing I find regrettable about it is that it does not play MP3s. It would be a great convenience on long trips to be able to load in several hours of music on one CD, eliminating the need to be constantly ejecting and reloading. My question is: is the same in-dash unit from any later year Dodge Caravan MP3 compatible? (I'd like to keep the same look and fit of the factory original, just adding MP3 compatibility...)