I tried that and the ones I found do not match up. And those particular copies of the books that they used are very hard to get hold of.
EDIT: That Treasure Island map is not matching up well. It seems we either get someone decent at Photoshop (Not me certainly, I am still learning it) to clean up the photos or find the exact books that were used and, after tracking down these copies (I think they are the first editions) and probably spending some money on them, we tear out the pages to make a simple paper prop.
EDIT2: After that ramble, I found a picture from the credits. it matches up the three parts. I have printed it and I shall attempt to recreate the basic shape. In the meantime, I hope someone can clean up those pictures to make a digital version to compare with my drawn one.