The Navigation.com website now has the new 2017 maps for Z130BT, Z140BH, X930BT, X940BT and for earlier models Z110bt, Z120BT & X920BT. http://www.navigation.com
I suggest reading the installation instructions found on the above website before installing.
Note: I posted the same message in the X series forum and requested that they post any discussion on this update here. The F series guys (which use the same firmware but EU maps) usually are ahead of us on finding hacks, so keep an eye over there.