I already wrote what's available on the SE coast (from Jupiter to Miami) in this post:
http://www.quiltingboard.com/t-43213-1.htm
While I haven't checked out every shop on the west coast, I will tell you that the
http://www.quiltlovershangout.com/ is one of my favorite shops. It's located in a sort of deserted shopping center behind a Perkins(?). If you enter right by the Perkins, it's towards the shops in the back to your right.
I really, really like the Hangout.
Not far from the Hangout, is
http:www.susieqquilts.com - I've never been. I don't know why since it's so close. Next trip for sure.
http://www.sewstudio.com/ is in Naples, not far off of 75. I think they used to have a shop in Ft. Myers too but it, like many others in the area, closed in recent years.
I'm sure others more local to the SW coast can add to the list.
Enjoy your stay!
And if you can edit the thread title to reflect "Florida Fabric Shops," that would probably be more helpful to other readers.