There are images like this (or similar?) on the Flickr website. It's like putting 35mm in a Holga or Diana -type camera, which is made for 120 film, so you get the sprocket area covered too. Some of the pics are very interesting. I think there is also a digital-based software for putting the sprockets and Holga light leaks on to "normal" images, for folks who want the look, but not the "expense" of the Holgas. Everybody should have a hobby, as I like to say...
I hope this helps you.
Paul