I use them for various things in my part time leather business, so I have a stock of them.
I get them from a wholesaler than has a $70 minimum order.
You probably don't $70 worth. If you want, you can get them from me. They are fairly cheap. Send me a PM and I'll get you info.
I have them in solid bronze, brass plate and nickel plate. I believe they take a #8 screw, which you will have to come up with at your local hardware store.
I'll be gone for the next week, so if I don't get back to you right way, that is why.