2013 Mazda 3 Navigation Chip?
 

I recently bought a 2013 Mazda 3 I -Touring, I have the screen related to navigation, but the vehicle doesn't come with navigation without a package. Another gentleman at my work also bought a 2014 Mazda 6, and has the screen without the navigation addition. He is under the impression that the chip for navigation can be installed aftermarket, can you purchase this and install it to make the nav work? Can't find any info on it anywhere.