Where is the code for the blood dragon armour on the steam Version of Dragon Age: Origins?

Well its pretty much explained in the title :)

Thanks to anyone who can help.Where is the code for the blood dragon armour on the steam Version of Dragon Age: Origins?
It's not one specific code.

The Blood Dragon Armour was only available if you bought the limited edition version of the game, which if I remember was only two or three pounds more. Inside the limited edition box you got a code which would only work once, and was unique to each box. So there's no way to get the code unless you bought the special edition or can find someone who doesn;t want the armour (which would be silly because its awesome).