I appreciate Shibby's reply, but I don't expect all users to always know this - so OPs request is still valid. I do agree to go ahead and post these in the requests sticky. We do look at those and discuss them when it comes time for requesting more books.
Artists very often update their artwork for book editions, for good reason I would say. I'd imagine if you were an artist on a time crunch of a release, when it comes time for your book release you'd wanna update some artwork too. It's always nice seeing how artists change things around to how they would have preferred it. SAVAN is a perfect example of that in terms of updating artwork even in their Melty Lover title.
If we just slapped together stuff from magazines, not only would it be insulting to the artist's hard work, but you guys would miss out on all the improvements from the artist.