'Go-fast glasses' can be purchased via Ranger Joe's; however I think you have to get your own lenses put in. As I've never worn glasses, I don't know the ins-n-outs with them; but Ranger Joe's is where you can buy them. Catalog or online. They're very stylish; and sure to get you laid.
I did the research for you: www.rangerjoes.com, go to 'eyewear', then to MAG-1. That appears to be the actual name for them (MAG-1). Who knew..
Eyewar
If you wear these you will have to use some 550 cord as a replacement for the rubber strap. The strap that comes w/ them aare extremely thin around the temple area to allow use w/ a gas mask, but the rubber will easily break or melt fropm bug juice. these are army issue I believe and you should have no problem getting them issued.