Oh. Yeah. We did. We saw them at Comic-Con in 2009. I'm going to cut Blizzard a break on this one and assume it doesn't control DC Direct's production and distribution facilities. So ... DC, this one's for you. Holy crap, guys. Almost three years ago! Three!
Well, anyway, if you're looking to spend your hard-earned coins on different coins that aren't worth as much as the ones you started with, you can purchase them on the North American Blizzard Store for $49.99 USD per set or on the European Blizzard Store for £56.95.