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.

The keys do not work for Steam, since they are retail. I am asking if anyone has a torrent link. I couldn't locate one.