Check out Orange Cycle at 2204 Edgewater Drive, orlando. It is a great bike shop that does have tri clothing. Then there is Front Running Sports at 3801 W. Lake Mary Blvd, Lake Mary, FL (outside Orlando) that I hear is a good tri shop, but have never been as Orange Cycle is just blocks away.
I have already got google directions to Orange. Now all I have to do is trick the family into believing that Mickey and Mini will be signing autographs there.