Where do I get the 1950's nerdy black framed glasses with the clear Lens?!!!!!!!?

I need to find a store that has the 1950s style square (black) framed with the clear lens nerd glasses. I'm being a dork for halloween, so those would be perfect!:)If anyone knows where to find them... please tell me the store(not online) this is what they look like .http://cgi.ebay.com/New-50s-Nerd-Glasses鈥?/a>Where do I get the 1950's nerdy black framed glasses with the clear Lens?!!!!!!!?
you can get them pretty much everywhere. At dollar stores, costumes stores or ebay. But i would defenetly go to a costume storeXD