Not long ago came across a pair of GASCAN on a local trading site. Does anyone know what these are, or are they just a custom pair? All the description says is that they're GASCAN S, brown with black Aztec writing!?!? I'm on the iPad atm so I can't pop onto the Oakley website to check out the custom options for GASCAN. If someone could shed some light it would be nice. Thanks in advance!