Gord,
In the US, that’s “standard hardware” and some of us source it from pretty much anywhere.
Could call Precision Hose Technology in Tulsa (I had them make all new hydraulic hoses for my bird) they’ll know exactly what that fitting number is.
Www.aircrafthose.com
Alternatively, could call my favorite supplier, Genuine Aircraft hardware in Billings, MT and ask them. They have a great free illustrated catalog and know their stuff.
Www.gen-aircraft-hardware.com