tropic also flies twin otters, and a little 4 seater that i forget. mike kuhn is the chief pilot out of tropic, so contact him directly.
you also might want to check with TACA airlines, as they fly daily to san salvador and houston, so maybe they will have a need for someone based out of belize. they fly, i believe, an 18 seater.
good luck, its a great place to be a pilot. same job you would do anywhere else, except, well, its HERE!
PM me with your resume, and i'll see if i can walk it in to tropic for you.