Found this, for what its worth: http://www.google.com/patents/US7051389
Seems it's called The ComfortPillow by Tempur-Pedic(TM).
Here's an Amazon listing for what looks to be the right pillow: http://www.amazon.com/The-ComfortPillow-Tempur-Pedic-25-Standard/dp/B000Q8T2F0
I think it's this one. Maybe you can find a cheaper one somewhere else.