I assume the author couldn't find a background of the right size (sorry if I'm wrong).
Well, I'll post what I found + a page from a spellbook, which could also be used in theory.
Added 6 minutes later
Actually, if you really need frames but don't want to clutter the screen, you could use the frame from the battle log; it has a neat, dark frame.
The frames won't work. I specifically didn't make them.