Have you tried warby parker yet? I would also reccomend Eyebuydirect.com as well as coastalcontacts.com. Coastal contact always runs promotions were they give a certain amount of frames away free (although it'll still cost you 15-20 in the end, still pretty reasonable.) I did a quick search and found these http://www.eyebuydirect.com/fashion-...wn-p-3806.html
there obviously a bit darker, but I'm sure if you go through the site you'll find a lighter pair.