While not officailly Jamaican but more Caribbean is Anntonys Caribbean Cafe. It has been here for years and is really good.
Welcome to Anntony's Caribbean Cafe
Looking at the website I did not realize they had a Sugar Creek locale. Is this the one you ate at?
There is another Caribbean style restaurant at the corner of Central and Pecan, I have never eaten there before so I can't comment on how good it is.
GoodLuck!