Hello BR,
We have been a good few times in the last decade, one thing Florida as a state is HUGE! so when you sat Florida are you staying around Olrando? Orlando to Miami is something like a 3-4 hour drive I think from memory!
Shops around Orlando for me the must visit was Colonial Photography, which is a good general hobby store away from Disney, other shops we had visited on previous visits seemed not to have survived!
Ian