I purchased an F150 Supercrew with the 501A luxury package, it comes without navigation...What do I need to do to add factory Navigation? The My Sync website shows the my touch Navigation is based on an SD Card System...Can I purchase the SD Card and get maps to display? How much would something like this cost?

I apologize if this topic is beating a dead horse but I would like to add Navigation to my pickup...

Any help is greatly appreicated