Battlefield 2142 Lost CD Key

I recently decided to Re-install my copy of Battlefield 2142 after downloading your promotional copy of Battlefield 1942 for the anniversary. But, on opening my case for the first time in nearly 6 years i saw that i had lost my booklet and therefor had no CD Key. I have played the Battlefield series all my childhood and on into adult life. I am currently a premium player of BF3. Anyway if i remember correctly my origional account name for BF2142 was Stalker2K7 or 6 and was attached to a previous email address of mine [edit: email address removed]. Overall i am wondering if there is anyway you would be able to get me my origional CD key back for my game or give me another one so i can play my favourite game of the series! 

Thanks.