We have a store in Michigan called Hobby Lobby(think they are a national chain) that has a couple isles dedicated to beading/jewelry making. I used to think this store was for crafty girls only but I keep finding useful stuff for My hobby bench! I had planned a trip as I know they have Very flexible metal cable in these sizes (planned upgrade for Wilesco crane) but now I will look for this type of product to! I am hopeful to score some similar but in "Belt" Black...or Dark brown would not be bad as well, my mother used to sew on and old foot pedal operated sewing machine and it ran on a brown "Round" cross section shaped leather belt. As a child I was fascinated by how well this old machine worked.