Your guess is as good as mine. For all of it's charm, unless it's Marine or giant cichlids, Miami leaves much to be desired regarding fish. I am from there as well, and am always disappointed with their selection, especially regarding rarer cyprinids and anabantoids. I plan on doing a pretty thorough search for some decent LFS when I return. Where in Miami are you? I live in West Kendall. Have you tried Exotic Aquariums on Bird road? It'll be on your left hand side if you're coming from the west. Last time I was there, they had some pretty nice ones and even a half giant plakat. I'm positive they could order what you want. My only problem is that the quality was not as good as it has been.
I do know, however, that several transhippers reside in Miami, and there should be several breeders in the area.