This video is a Quick Jewelry Making Tips for Modifying Your Ring Clamp to Bezel Set Stones. The Rubber Inner tubes I use are from a kids bicycle, which many people have around if you have kids. If not, ask a friend who has kids. 1 inner tube will give you enough of these rubber bands to last a lifetime.
Also there are MANY FREE tips and tutorials, as well as FREE downloadable content at JewelryMonk.com.