Is there a place in Cambridge or Somerville where I can I buy fish sauce (nam pla/nuoc mam)? The Thai Hut on Beacon used to sell it, but they are no longer selling anything except their dire takeout
You don't specify anything about it, so although it's relatively pricy and probably not the most authentic, most supermarkets would have Taste of Thai brand in the ethnic food aisle, which should see you through (has anyone seen the 'splash' lime chili dressing they used to make locally lately? I used to love that on tomatoes). Per their site, these stores carry their products
Shaw's, Wild Harvest
Stop & Shop
If its not at Reliable, you are probably best off going to Allston for the Super88. The place in Fresh Pond was called the New York Oriental Market and carried some unusual items, although mostly Korean and Japanese. I hadn't noticed it closed. The only other thoughts I would have is calling Captain Boston Fish Market on Main St in Medford (Somerville line) to see if they by any chance carry it or call J&K Han A Rum Oriental Mk on Mass Ave in Cambridge (near Hanna Sushi). Respectively (781) 395-8138 and (617) 547-8723 -- both are Korean but the owner of Captain Boston stocks a few other ingredients, Yoshinora is (617) 491-8221. My sister used to cook Vietnamese quite regularly, so I will see if she has any other thoughts, but I don't recall her going anywhere except reliable and the super88.
I'm pretty sure that Whole Foods at Fresh Pond has Tiparos brand too, which at least comes in a decent size bottle. And Whole Foods on River St. usually has Golden Boy brand, which is much much better.
I got Golden Boy at J & K on Mass Ave in North Cambridge once, too, but they seem to have stopped carrying it.