I've been having a hard time finding a compatible forend for my Mossberg 590A1 SBS w/ ghost ring sights (51689). Ideally I would like one that either is an integrated weapon-light or a rail system. I've tried both the standard and small models of the EOtech Integrated Shotgun Fore-End Flashlight but neither fit. I routinely come across forends marked as compatible for the 590A1 but in reality not compatible for the 590A1 SBS. That said does anyone know what, if any, forends are compatible for the 590A1 SBS? Your help and time is greatly appreciated.