In this case, with the original files, it's just a matter of time for rewriting and was Tom stated, he doesn't have it.
If those files were still missing, it would be a matter of rescanning the photos (if those were available) and effectively designing the book all over again. For a book with a wealth of color photos, a lot more complicated than a manual, that would be a major pain in the behind. The next option, as Tom mentioned, is rescanning a copy of the original book, which brings more technical gremlins into the room with the photos and sometimes with the text.