Uconnect 430 vs 430N

[304mike]

Hello Gentlemen,
Long time, no see. My wife and I just bought a nice used Town and Country van that has a "Uconnect 430" audio system in it. However, it doesn't have the navagation/gps in it, as does the "430N". I was wondering if it would be possible to upgrade to the "430N" by adding some software, if that's even possible. I might be farther ahead to go to Best Buy and just buy a GPS. Any thoughts or suggestions would be greatly appreciated.
Thanks,
Mike