Omni-Blades

I bought both Mass Effect 3 and Kingdoms of Amalur: Reckoning. I redeemed the online code and got shepard's armor, but i can't get the daggers because there is no Mass effect 3 demo in my playstation store. Can i still get the Omni-blades since i Bought and finished the game before or i can't get access to them at all?

Regards