This may be too late but I'll post anyway.
Most of the factories in town are in Little Havana. More specifically on SW 8th street (Calle Ocho)between approx. 10th Avenue and 17th Avenue.
Most notably you will find:
-La Luna :love: (if you go don't miss out on this one)
-La Gloria Cubana
-Padron (on Flagler and 16th avenue) beautiful new building