Teitel Bros sells a wide variety of Italian deli and grocery items--at low prices. I always buy their oil-cured olives, CT-made creamy ricotta, SicilianEVOO by the gallon, homemade Torrone and more.
It can get very busy here - lines outside and around the corner. Plan to arrive early (before 8), especially in the days leading up to holidays. The house brand olive oil-Edda-is a very good value.