Re-Installing Studio 09

In 2011 I purchased a licence for Studio 09 & had been using it without any problems.

I have recently been taking part in the Studio 13 Beta Test, which meant I had to remove 09 from my computer and install Beta 13.

Now the company i work for has said no to the purchase of studio 13 I need to re-install 09...  where do I need to go to get the download?  I can only find Studio 13 shown on the Articulate web site.

Many thanks in advance.