Maple syrup from a connecticut location. Maybe buy something at a farmers market from a local farmer? A bic razor! A pez toy if you can find one. A subway sandwich (they are based in Milford). A Stanley tool product? (Based in new Britain)

Edit - go to guilford and get something from bishops orchards - they make a lot of baked goods they make and sell on site. At least guilford is still in New Haven county!