Geoff, Had a better look with my glasses on and it is ZAC0437. This is listed for use with the WS52 and the WS9.
The WS18 and WS38 used the aerial bag MK 3 which had a shoulder sling for carrying as these were manpack sets. The WS22 was never made by Canada so I wouldn't expect to find a Canadian made (ZA-C) part for them.
We haven't answered your query David but will continue to dig. Maybe Chris S. will appear with the answer.
So my bag that c/w 3 F rods is for the WS9... hmmmm.
