Artist Laurent Gontier has created not only an impressive, hand-crafted version of the Necronomicon, but a variety of other historical tomes. The text of his website is in French, but his ample illustrations transcend any language barriers.
Among his other works is a fantastically detailed recreation of the Grail Diary from "Indiana Jones and the Last Crusade".
As an aside, finding sites like Mr. Gontier's is difficult because of the language barrier reinforced by search engines like Google. From personal experience I know that France, Germany, and Japan have large and enthusiastic communities of Lovecraft fans, but their counterparts in the United States rarely see much of their excellent work. While I actively look for new props and artwork on a regular basis it's very rare that I ever get a search engine result for a non-English page, even when photos and text are purposely flagged with "Cthulhu" or "Necronomicon".
Admittedly, part of the problem probably comes from my own language limitations. I have a tourist-level vocabulary of maybe a hundred words and phrases each in French, German, Spanish, and Italian, just enough so that I can be reasonably polite while I'm traveling. That's not nearly the level of familiarity needed to access the numerous non-English LARP and artist's sites around the world. That said, I'd like to actively encourage anyone aware of sites I would be interested in to email me links.
Update: Mr. Gontier was kind enough to send over some more detailed photographs of his work. A closeup of inserts for the Indiana Jones Grail Diary:
More pages from his Necronomicon reproduction:
The accompanying notes from the Necronomicon:
In addition to visiting his website, you can reach Mr. Gontier via email at: lgontier[at]free.fr