navigation on back order

so i took my c in to ARRIGO chrysler in west palm casue my joystick broke. its been three and a half weeks and still no call. I call every week and get a different story. the last on that thye told me is that they have to order the navi's from a company called star and that they are on backorder and they have no idea when they can get one. I have no problem with this if it is true, but I went to a diferent dealer before and they said i could get it in a week. only problem is that that dealer is in a different city. I'm sure some of you gota know something about where they get the navi's from so if you could pleae help me out it woul be appreciated.