In talking with T, I just remembered one thing about getting Portuguese wine in the US.
I know that in Fall River MA, New Jersey, Hells Kitchen NJ, Boston MA, there are very large Portuguese comunities that are "fed" thru several wine stores and supermarkets speciallized in Portuguese wine, beer and food. (the famous Portuguese BACALHAU . cod fish .).
I don't know how you can get a hold of them, but if you can, get in touch with them, they do stock all the wines I mentioned, and are cheaper than "specialized" wine stores, because they sell to the Portuguese comunity.
Try locating some and let me know
UPDATE:
Try these:
http://fall-river-ma.iaf.net/city/wi...tts-ma-70.html
http://www.apol.net/dightonrock/Codf...%20Alta%20.htm
Just get in contact with any Portuguese there, he will help you