Hello,
provided that I understand you in the right way, here's a link, wher you can download CS6 as a trial version and change it then into a "real" version by help of your serial number: Download Adobe CS6 Trials: Direct Links (no Assistant or Manager) | ProDesignTools
AND note the : "Very Important Instructions" mentioned there.
Maybe you have to activate/deactivate first please have a look there:
http://helpx.adobe.com/x-productkb/policy-pricing/activation-deactivation-products.html. Please work through al the headlines, which come into question at http://helpx.adobe.com/x-productkb/policy-pricing/activation-deactivation-products.html>>> Deactivation or sign-out problems >>> I cannot access my previous computer >>> Have your serial number or Adobe ID ready, and then contact us. >>> or better (I quote from Preran: The chat button is activated as soon as there is an agent available to help.)
Hans-Günter