The Kiwi pomme kit, made in NZ, went with the aircraft. The Strikemaster guys dressed UK and the A4 guys in the next shed dressed US. Different flying boots even.
That way neither aircraft maker could blame the wrong type of flying kit for the jet not working.
As far as helmets go, a friend of mine had a freiend who punched out of a Fulcrum. Got MDC splatter and blinded in one eye.