Tarpon is huge from right around there and down south.
Hey rmac, give these guys a holler...
http://tbffc.org/
That's the website for the The Tampa Bay Fly Fishing Club . I'll bet if anyone can put you onto a shop in the area, they can.
I do know that in October, I read of a new fly shop opening in Tampa, called
"The Tampa Angler". Supposed to be pretty complete.