Thanks to the folks at PC gamer for first tipping me onto the story: (link)
In short, anyone with a bioware social / Ea/ Origin account can stock up on these hitherto unavailable items.
But my question: Why?
Why would EA/Bioware make those items available? Are they just trying to get people to maybe play a little bit of their DA1&2 leading up to some DA3 hype? Or are they simply trying to get some numbers on active bioware social accounts to see how many people they could pull in with DA promo items? I can only think that if they're tracking the number of claimants, that data is supposed to tell them something.