they also used to make the EXACT same glasses in the 90's, but they didnt call them frogskins. i saw a guy the other day at Q'doba wearing black ones that were probably 10 years old but they were an identical mold...same logo style on the ear pieces and everything, even reflective lenses. they probably werent called frogskins back then, though, but who knows.
i guess what im trying to say is do some research and try to find some of the old ones online on ebay or something for super duper cheap. if you get them in good condition, youll be a winner, and since they made them in different colors back then, people will think you got your hands on some sort of special edition ones or something.