Where to buy hose union reducers in Vancouver?

[Samw]

I've don't think these (union reducers ie. A7UC6 in the link) are at J&L nor OA. OA has unions but not the reducer unions where one end is 3/8 and the other end is 1/2. Also, for John Guest brand, OA only has 1/4" fittings (according to the website).

I just need a union reducer. It doesn't have to be JG brand. I could go to a plumbing store. I just didn't want to look it up in the Yellow Pages. Usually, when I look something up in the YP and then go to the store, I waste my time as the store is nothing like I thought it would be. Which is why I prefer to ask someone who has a favorite store that they go to.