Many yeshivah ketanas in any neighborhood with a large percent of English speakers will have English speaking students. But will that help you? In these yeshivios the shiurim will be in Hebrew, and staff most likely to be Israeli, although I can think of some that are run by Americans. Also the level of learning may be very different from what you would find in a mesivta in Chu”l. Or do you mean a place that specifically has a program for chutzniklim with shiurim in English?