I now remember going to the local NAPA store last year looking for the fitting. They didn’t have it and told me that the NAPA stores in Canada are different from those in the USA, and their “systems” are separate and do not communicate. Told me they deal with Fairview fittings, and if I could find it in their catalogue, then they could order it for me. Couldn’t find in in the Fairview catalogue. Started looking again, it it seems the Weatherhead/NAPA WH1512 is getting harder to source. Seems Danfoss has now acquired Weatherhead. Found a guy on eBay and an American site, but shipping was approaching US$25 plus. So, found this company in Canada. Ordered one (CAN$25.24!), but still waiting on shipping quote which is kinda weird.
https://www.motionindustries.com/