The last few years I’ve seen galangal regularly at the Somerville Market Basket but not Thai basil. Also at larger whole foods such as River St. It freezes well. I haven’t been to Russo’s lately, but I remember both it and Thai basil there and they usually also have lime leaf. I’d call unless you are going to Russo’s anyway. Mentor Flats at some farmer’s markets usually has Thai basil, but it’s too early in the season for local basil. I don’t know about HMart. In summer, probably easier to grown your own Thai basil.
I can’t get to Revere or Dorchester very easily so I haven’t checked the places suggested in years. When I was going through a Malaysian/Burma phase some years ago, and did check out Revere, I didn’t find Thai basil or other fresh southeast Asian ingredients except lemongrass, which is everywhere now. If you find a reliable source, please post.
