Need help on product key for future install

I have Norton Internet Security 2012 and have had norton on my system for years.  I am adding a new harddrive for my system and will be installing it shortly.  I spent last night just trying to find a product key so I am ready to install.  I followed the steps on how to get the product key it makes you log in online to get your product key.  I have no idea what e-mail was used to set up the account.  I have changed internet providers a few times which inturn has changed my e-mail address all old address are dead.   I tried my current e-mail and set up an account.  But It states no products listed.  This makes absolutly no sense since form the same web page I can verifiy if my software is up to date and it is.  I gues what do i do???