I'll have to keep looking. They didn't have it at the supermarket up the road, they had the Guinness Stout. I did a quick skim of the beer aisle and the walk-in cooler but no dice. I even asked when I was checking out and I got the deer in the headlights effect, they never heard of it, and neither had I 'til recently.
Hallowell is pretty into beer, maybe there, and I'll keep an eye out when I'm on the road.
Edit : typo