If you are craving the specific flavor profile of the Liz Lemon pint, you will have to recreate it or look for similar options:
Unfortunately, you cannot buy Liz Lemon's flavor in stores today. where to buy liz lemon ice cream
Check local, independent ice cream shops that frequently rotate seasonal flavors, as lemon and blueberry is a popular gourmet pairing. If you are craving the specific flavor profile