Hi, I need a new sprocket to fit a freewheel hub that looks like this: "http://www.scooterparts4less.com/web_electric/wheel_sprocket.htm". The sprocket needs around 40 teeth and needs to accept a 1/2x1/8 chain. I have tried to contact the custom sprocket dealer in the ads on the side of this webpage (king sales and service, custom sprockets) but I got no response from both emailing and leaving a message via phone. I think they may be out of buisness. I had hoped I could send them the freewheel hub and they could just adjust the hole in the center and the screw holes on the custom sprocket. I have thought of other ideas too like taking off the second sprocket of a chainring set that would have the right amount of teeth and using some sort of adapter to bring the screw holes down to where I need them. However, it would be very hard if not imposesible to mount the sprocket true, if its off by the tiniest bit my chain will get tight and loose constanly as I ride. So my question is do you guys know any place I can get a custom sprocket or how I can make somthing?