They were available to the athletes during 2012 London Olympics in the Oakley safehouse. Never available through custom. Only athletes got them so they are really rare. I just wish the seller would part out this collection.
There's basically 15 sunglasses with 40 lenses left over. If the average value of the complete pairs on ebay is $135 and the individual lenses about $40, the ebay value is about $3625, not counting the labor to list 55 auctions and answer all the questions written in poor English and cringeworthy grammar.