If you want occult Nazis, you have got to pick up the Hand of Glory book for Spycraft. Even if you don't like the rest of the SFA setting, the book gives great shadow history, motivations, reasons why the Nazis failed, what happened to them afterwards, etc. Chasing down Nazis in the '50's trying to rebuild their empire in the jungles of Argentina (does Argentina actually have jungles, or is it too far south?) would be such a cool campaign.