The maps can be updated now but at a odd price of about $650. I did find the page at one point, but can't remember the link.
The other option is to do a head unit replacement with one of Android Tablet versions that are available to suit. There are various youtube videos around with people showing it running. @eddysdaman has done it and mentions the issues he has with his units, although I recall reading during my searches that an updated model had solved some of them, sound quality being one of them, in fact one Youtube video where the owner had commented that the sound quality was better than the original built in system. Plus of course you get additional options of running Android.

Currently, I have done neither. Instead, I just listen to directions from my phone piped through the aux. Just like having a passenger give you directions, except this one is actually sending you the right way.