Nice work. Here is a method to make them without kits.
Take a 1/4" steel rod 5 inches long. Drill and tap one end for a 8-32 hex head machine screw, That is your mandrel,, cut a blank about 3" long, drill a 9/32 hole in one end 2.5 inches long. Drill the rest of the way with 9/64, Slide the blank on the mandrel and use a 8-32 hex head machine screw to hold the blank in place. Turn to shape.
Chain and parts are available at most good hardware stores. You can buy the chain by the foot and the connectors etc.. Put a ball on one end drop the chain through the big hole and attach the connector. Easy, at a cost of about 30 cents.