Hi all, Just bought a pair of brand new Oakley fives squared (SI edition) off of eBay and would like to add polarized lenses to them.. Does anyone know if the regular fives (3.0) lenses will fit or if they need to be SI specific? If they need to SI specific, are there other sources outside the SI store (not qualified to order from there)? Found a couple sources (example:http://tacticalgear.com) for the glasses but not the lenses, but I'm also not sure if those sources are reliable/credible. Thanks in advance for your help!