It is quite easy to make your own lead molds. The needed ingrediants are a hot plate to melt the lead. A two part mold sides to frame the mold. A base plate of aluminum and some wooden tapered plugs for the holes thru the mold where the webbing passed thru. The mold plugs are made from wood, the wood is cut approx 2.25 inches wide and then tapered by sanding so that they are easy to remove after the lead hardens - see the example.jpg. The process is as follows you use superglue to attach the plugs to the base plate. You use clamps (or superglue if your 2 part frame is metal)to attach the frame to the aluminum base. Next you pour in the hot lead . Let it cool and then remove the frame and then knock out the plugs. Here is the back plate frame.jpg and the final cast product . When the webbing or rubber webbing is attached the harness looks like this . The back view on Naoki is here . And the front view of the harness looks like this . Another popular Southern California weight system is also easy to make. Here is an easy to construct mold made outta wood . The aluminum round bar is for forming a finger access slot in the weight shown here pushed all the way in . Lead is poured into this wooden mold as is illustrated here . Here is a pic of the weight removed from its mold . The cast weights need to be drilled all the way thru with a 5/16 in drill and then halfway thru with a 3/8 in drill as this finished pile of finished weights shows. A 3/8 in rubber tube of about 7.5 inches in length is pushed thru the holes in the weight and secured with lead bullet weights. Here is a pic of the final finished rubber attached to the weight . The weight is easily attached to the weight belt webbing .