I was searching something on Flickr, and this fun thing popped up:
“Moleskine Hack: Turn a Large Sketchbook into a Storyboard Notebook …after constructing one in Adobe Illustrator I was able to transform a Large Moleskine Sketchbook into a Large Moleskine Storyboard notebook with very little effort…. be the envy of all your friends!”
His blog had the printable file, but it’s shut down. So I hacked one together myself and you can download it here (it’s probably not perfectly perfect, but it should work fine).