I bought fresh jalepeno peppers in Mercado del Progreso in Caballito that burned my hands for 10 hours after cutting them--that'll teach me not to use rubber gloves. If you're looking for the pickled kinds in the jars you can get those pretty much anywhere that they sell the refried beans in the can (Disco, Jumbo, Carrefour, and the much adored Barrio Chino grocery stores)--however, these might fall prey to the food ban that was talked about a lot back in May. I still see French jelly on the shelves, but not the refried beans (except black) very often anymore...