I have a LeFever Nitro 20ga SxS that is near perfect; however, the gun is fitted with a forend from a 16ga or 12ga--I guess. The serial number in the forend is not the same as the number on the receiver. As such, the forend metal is slightly wider than the receiver. I've watched for a 20ga forend for several years and have never seen one for sale. Does anyone know where I can buy a nice 20 ga forend or have any other suggestions?