Sweetgrass Farm Winery and Distillery, in Union, ME, makes a very wide range of products, including the delicious Back River Gin  and a Cranberry Gin described in the Artisanal Gins made in New England section of this site, and a Dry Vermouth (as far as I know it is the only vermouth made in New England).

I have bought the Back River Gin as far away as the Bow Street Market in Freeport, and I think I saw the Cranberry Gin there, but the vermouth is available only at the winery. Fortunately the winery is not only easy to get to, but it is very scenic as well, and Keith and Constance are very friendly when you get there!