That is Dan Shaver. Shaver & Sons Enterprises Ltd. (204) 467-2605. Do you mean the 3 inch wide lagging that bolts on to the aluminum or cast sprockets or do you have the molded sprockets ? If you have the alum or cast you can cut 3 inches out of the centre tread on a bias (not steel belted) tire and it will last a long time but may not be worth the extra hassle if you can buy the lagging precut. It is a bit of a struggle installing but not too bad if you can get the sprocket in a vise and you have lots of c clamps and vise grips to hold while you drill and bolt through the existing holes.