Hands down, this is delicious mustard. Seriously good, seriously worth it. We buy SPREAD SOME LOVE mustard upstate at Peck's market near our house in Barryville, NY. It comes in several "flavors" but we love the Cabernet Sauvignon Roasted Garlic. It is made by a small company located in Hawley, PA.
She is not set up to sell online but sells at several shops in Sullivan county, NY, and Wayne county, PA. Now that the weather is breaking, it will be available at many of the farmer's markets up there. Below are some stores that carry it, and her Facebook page that posts the farmers market schedules.
Alley Whey Cheese Shop in Honesdale PA and Peck's Markets in Eldred, Calicoon, Livingston Manor and Jeffersonville NY.