How do I download an old version of Adobe Acrobat 9 Standard?

I got a new computer and need to transfer the acrobat software over to the new machine but I have and old version of it. All I can get to download is the newest version of acrbat that I think is XI or something but my license that I have had doesn't work for that version. I need to download version 9 standard not pro and then enter my license nuber and it should work if I have deactivated it and unistalled it on my old computer right? Can someone please help me.