I did a bit of digging, and it appears that you can call Chrysler and request one at 1-800-853-1403, or if you're feeling froggy, you can download it from http://mofv.com/MyGIG/
Thats where I got the firmware update, they only have mygig and gracenotes software but nothing for navigation, the "nav" they referr to is some systems dont have nav capibilities and some do but no new maps. just called the # you gave and they said its available from the Dealer unfortuneatly they want $299.00 for it and thats to freakin high, thanks for your time.
I did a bit of digging, and it appears that you can call Chrysler and request one at 1-800-853-1403, or if you're feeling froggy, you can download it from http://mofv.com/MyGIG/