Amazon.com : DRELD Propane 1/4" Quick Connect Adapter with Gas Grill Regulator, QCC1 Adapter Propane Regulator with Quick Connect 20-50lbs Propane Tanks to Gas Grill, for Fire Pit, Heater, BBQ Stove Camping :
Series of quick ww1 Era style tanks as part of a planned future pack. : r/SprocketTankDesign