>>147474I don't think it's available commercially anywhere. It was made by a guy called Gord, who is what you get when you combine someone who's part inventor, part handyman at building/creating things, and an extreme bondage fetishist.
Here he is demonstrating one of his other contraptions, the "Air Chair", which utilizes several pistons on the back & underside to draw the straps even tighter after the girl has been cinched into position. Then the last piston is attached to a dildo that pumps in and out.