Anyone know where I can get a small hobby/toy ratchet mechanism?

I’m building a prototype device and I need an element of it to ratchet back and forth on a radial axis, like a socket wrench—but turns/ratchets in both directions. It’s more like a game wheel. A regular old gear would probably work, but I’m looking for a self contained gear and pivoting pawl—like something you might find in a small toy. Are there any hobby catalogs that sell this sort of thing?