What kind of exotic fruits in Houston or Galveston can I expect to be able to find?

Being close to a major international airport and close to a major international (namely Caribbean) shipping port I can assume a lot of Caribbean area exotic/tropic fruit can be found here, such as Mangosteen or Barrel Cactus, right? If so, where do I find them? Co-ops, Asian Markets, Grocery stores.. Buc-ee's?