I've tried to get my hands on their stuff in the past, and one of the issues appears to be that its considered 'national strategic' which is code for this stuff gives our military and advantage over other guys. And that was as close as I got to getting an answer for general availability.

That being said you can sign up as a developer and get a 'kit' which has like two eye pieces and various support stuff for like $20,000 but that was not something I could invest in to satisfy my curiosity :-)