i work in new look and we just got a delivery of sunglasses in, but in amonst the sunglasses were 4 different coloured style "fake" glasses! we got quite a lot of them in actually in white, black, red & brown frames - i dont know how much they are exactly but i reckon about �8.
the ones we got havent gone out on the shop floor yet, but if you pop into your local new look they might have them out, or at least in the next couple of weeks getting ready for summer launch - they will just be on the sunglasses stand! (summer comes way too early in retail :-( !! )
hope this is of help x