Anyone use pinlock anti fog visor?

Well, for this winter I decided to buy a full face helmet. I made sure I bought a pin lock because I read somewhere that they have the best antifog visors.
The one I'm talking about is like a double pane window, except plastic of course.
My problem, I cannot find the attachment to go with my helmet. Anyone have recommendations for a helmet like this, but under $300!
Thanks, Rick