I'm making a couple of 11x14 hinged, spring back contact print frames. The wood and glass is no problem. I know there are different ways of closing the back, but I'm pretty fond of those leaf springs. Spring steel is available at different places, but I want to do this for free with stuff I might find or have. I'm not even sure that those springs are really "spring steel". Not that familiar with metals.

Have you found a convenient way to solve this problem?