Capone's in Union Square, Somerville, and probably the one on Mass Ave in Porter/Davis, Cambridge, have it in 4 packs. It is still my favorite bottled ginger beer (regardless of the fact that it is made here in state).
Oh... I had forgotten that Capone's sells them in four packs! We used to get four packs there occasionally, before we discovered the cases at Wine and Cheese Cask. Thanks for the reminder: I knew there was somewhere else we used to get it that I was forgetting!
Thank you both for the information. I have buying buying the singles at the Wine and Cheese cask for years and never thought to ask them about buying by the case. It's good to know that four packs are available at Capone's too.