Hey Robert E,
Happy New Year to you and Loie. I have bought drums from Mr. Rodriquez in Dangriga but there are several gift shops in Belize that carry them. Depending on the size and type it would be best to custom order one though.
My sister Karen is co-owner of Papagayo so I can get her to set you up if you like or you can contact her directly. They also have Papagayo Two in the Tourism Village.