Working around the world

I have a new job that is taking me just about everywhere. I'd like to pick up some AS along the way. Can anyone recommend some good products and Pharmacies in these places? In the next few months I'll be in the following areas:
Georgetown, Grand Cayman
Key West
Oranjestad, Aruba
Los Rocques, Venezuela
Basseterre, St. Kitts
St. Georges, Graneda
Roseau, Dominica
Puntarenas, Costa Rica
Acapulco, Mexico
Zihuatanejo/Ixtapa, Mexico
Cabo San Lucas, Mexico
Later, I'd like to ask about my itineraries for Sydney, Barcelona, Amsterdam, etc.