Don't know, whether the U$ is cheap enough, at the moment. Best would be, to contact the various operators in order to find out, who is willing to buy.
The one problem you might face is, that in any of those countries you would find a few people who already import a/c. They know the ropes, but certainly want their cut. So if you are trying to make a profit yourself, you might end up with a problem. I will give you 1 contact in Nam, read your pm.