CoD5 WAW help

Before I begin, I apologize if this is in the wrong section. I couldn't locate a Call of Duty General Discussions thread, so I apologize.

On to my topic,

I have a 100% legitimate retail key code for WAW, but I need the files to download. Does anyone have the link at all?

I also had a legitimate key for CoD4 and files that I downloaded off the internet worked fine, I entered my key into the launcher and all is good to this day. I am in need of the WAW files, so if anyone can help me out I'd appreciate it very much. Thank you.

EDIT: Files to download as in the launcher where if you open it, you will be prompted to enter the product key.