A quick search and I found these: 4715SS(outlet), 4716SS(inlet) at http://www.passandseymour.com/ under Products-residential Contractors-Turnlok & Locking Devices-3 Wire Grounding-15A, 125V-Flanged Inlets & Outlets.
I'm always right. The only time I was wrong was the time that I thought, that I was wrong.
