Thanks to Beth for passing this along,
My 5 year old son has glasses and we go through about 5 pairs a year which can be very costly. This website www.zennioptical.com has lots of glasses for all ages including lenses for as cheap as $8. I just got him 2 pairs for $41 including shipping. I have used them in the past before I started reading your page and sometimes the shipping takes a while but the product is always good and well worth it since we always like to have extra glasses on hand.
The page loaded really slow for me….you might try this link too? http://www.zennioptical.com/cart/home.php