even passporter and birnbaums don't have specific enough park maps (like where restrooms/smoking sections/character greeting places are) You'll only find those in the park...
the best way to go about this - would be to have someone going down there mail you some. The parade/fireworks/other current information might be outdated when you go (which is why I believe they do not make them available outside the park.)
I'm headed down there tomorrow - I could do this for you if you'd like. (but please don't yell at me if I totally forget! heheh)