I'm headed to Belize in April and plan to spend some time in the jungles checking out the Mayan Ruins. I hear they have the Bot Flys there too. Apparantly though, the easy remedy to get rid of a bot fly is to just put a hunk of meat on the place you were "bit" and the larva will exit your body and go into the chunk of meat. Then you can BBQ and enjoy!
-Bal.