I made it out of thick coat hanger wire, it is based on a clip I have on one of my old pocket watches. Here are some closer up pictures of the one I made:

Sorry it doesn't look very pretty, if you use pliers with rubber coated jaws or something similer it will come out nicer. That was just the first one I did. It works quite well and didn't cost anything. Make sure you use thicker coat hangers though, the usual ones I get are coated white and are thinner and springy. They are easier to work with, but arn't as strong. This one was coated with some kind of yellow colored clear coat and are a bit more heavy duty, I think they are usually used for pants. Hope it works out well for you. <img src="/images/graemlins/smile.gif" alt="" />