There are decals available for both the 2003 regular car and the Marines car (only the hood is diffrent, I believe) but there are no decals available for the 04 car...an entire new set would need to be created.
Granted, most of the 03 sheet could be used, but the hood, decklid and the little outline mountains (which is what was normally on the decklid, IIRC) would need to be done from scratch, and the contingencys would need to be sourced elsewhere too.
HTH.