Fire Department Air tank adapter

my second posting of the day!

​I have access to FD air tanks. they have the MALE DIN fittings. (as reference to Omega tanks with FEMALE DIN fittings). I am trying to find a supplier of charging hose and adapters for the male din. would need to be female fitting, service and vent valves w/hose and foster fitting(s).
where can I start looking????
Thanks.