Amos Professional 2.0 was the final version of Amos before they quit making it. It comes from adding the compiler to AmosPro 1.12 . You can download AmosPro 1.0 and the updates to get it to 1.12 and the compiler disk to get it to 2.0 at the Amos Factory website RedNova mentioned. You just have to sign up for a free membership and look in the downloads area.
-edit- You don't need the Amos Updater disk, just the documentation and the manual. Last I knew you could get the AmosPro manual from
Software Hut (see the 5th item from the top).