Welcome Rabys!
I'm also in Jersey (well, home for at least for today and tommorow, then its back to school down in DC). Don't try to deal with the NJ MVC (Motor Vehicle Commission... its supposed to sound better then DMV), they will go out of their way to make sure that you are inconvenienced. Since they don't have the records anyways... or at least claim they don't... your best bet might be to track down the dealership. Look up the various area Mopar dealers, call around, see how long they have been in business, and if they have any of their old sales records. Good luck, and welcome to C-C.C!