Hex hasn't checked in here in over three months so don't hold your breath waiting for him to respond.

Regarding your statement here:

from a location where they purchased a few legally
If I remember correctly, the way the Trading With the Enemy Act is worded, it's impossible for any US Citizen to "purchase a few legally" because this act prohibits any US Citizen from purchasing any Cuban product anywhere, not just within the United States.

If you can find some sort of document that allows US servicemen some kind of exemption to the Trading With the Enemy Act, I'd love to see it because I personally don't see how any such document can possibly exist.