Searching for Sewer Hose Adapter

Just traded motor homes and let my sewer hose go with the old rig thinking I could duplicate it. The hose itself was not much, but I liked the adapter that interfaced with the dump opening. The adapter is a 90 degree type with a butterfly valve controlled by a bail. The 90 degree bend was spherical to accommodate the valve. I have searched the Internet, but I cannot find the same type. Does anyone know where I can get one.