Just got an email from Tesla saying that: On all cars produced from this point forward, Rear Facing Child Seats will be available only as a "factory installed" option. They will no longer be available as an aftermarket option through our Service Department. They are giving me the option of adding it. Personally, I would love to if they were half their current price. As is, it's $1,500 for my kids when they won't be using them in just a few years. Easy option to mark off. Interesting they are nixing it as aftermarket. There really is no reason to unless they just want to stop having the foot well in the back of the car.