Neither AlphaZone4 or Your Playstation Home list it as a reward yet. Clearly it is not in the store yet. So, it is likely part of a future game release add on, or future store item.. Contact Hellfire Games via their email. They are good about answering this type of question. Here is the address: info@HellFireGames.com
and he's name started with Bosnian...
If this person happened to have posted once on the Forums, search that name by "Users" in the top right corner and get back to us with an answer.