You have to be more specific.
I'll give you a satisfactory answer, even though you provided me with nothing.
There's no such thing as an unlocker for anything that you play on steam.
The only available option for you is to purchase the DLC's, because if you're connected it dials home and validates the packs you have installed to see if it matches the purchases on your account.
If you're playing a pirated copy, then just download the DLC's you want and you're good to go.