ChuckBear, Take Camco #59093 and remove the 1/4" IPS connectors from the Tee and put it in the line. You may have to buy some adapters but that will work. Sturgisafe is part #103602. MEC is part #ME412P.
All will work with the correct adapters. Discard the factory adapters.
I will bet if you go to a professional propane store that they will have them without the ACME or POL fittings.
If your grill has a regulator and it should to use disposable cylinders, it requires high pressure. The on off is a regulator.