I guess in countries where you're more likely to be driven around in the back of a 7, that type of option is more useful. Stateside I know the Jeep Grand Cherokee has it available as an option, as well as most of the higher end Mercedes.
2015 Ford Expedition Limited
2014 M6 Convertible Individual Citrin Black
2013 750i Mineral White
2011 750i Jet Black
2007 750i Monaco Blue