I've got several of the 65 hazard wiring harnesses and they appear to be factory appearing - at least the wiring and harness connectors look to be factory Mopar. I'll take a look at them next time I head to the storage building and see if there's a part number on one.
Several of the ones I have use a toggle switch with a chrome bezel like the plastic map light bezel. Another style I have uses a push/pull switch that would be mounted in a hole in the dash.