As I said, internet bullies and sophomoric humor sites made the Bush = chimp pictures but to the best of my ability to locate through Google or archive searches, never by any main stream media.
The political cartoon that the Post published was in my opinion a very deliberate attempt to stir up the exact thing we're seeing here, lots and lots of discussion. The Post needs exposure very badly being the much smaller NY paper during a very difficult time for newspapers in general to stay afloat.