I'm guessing you are talking as an add-on after the vehicle was built. Looking at the website, it appears only the Platinum has it. Adding it on after the fact, if it is even possible, I think would be rather expensive as the feature uses several different features. Because of this, I would doubt that you can add it. My Aviator is the 4th vehicle with this type of feature and I've used it once just to try it and that was on my 2011 Limited. In my area, there just isn't a need for it.
Peter