I think you can count on the fact that if there was a "real, original" document, it has since been destroyed.
This whole excercise took place because Trump started to bring up the academic records - Barry now has the excuse to say "You see, it doesn't matter if I release the records - these people will never be satisfied. So I'm not going to waste time releasing any more records."
The issue I have is that with modern forensic technology, and with the knowledge of RatherGate, the Administration would have to be politically insane to forge this document because it wasn't necessary to do so.
Now personally, I've always been more interested in his academic records anyway because I think they'd expose the myth that he's some kind of hyper-intelligent prodigy. That's the type of evidence you can lay out there and just let people come to their own conclusions, which is always more persuasive than evidence that has to be explained in great detail to be convincing.