When you ask for a Nam-Commie Style what are you looking for,
1) VietCong and there Black Jammies
2) North Nam regular Military
3) DemRepulic of Nam (todays Nam) Military or Elected Ruling Class
4) The Man/Women on the street period 1947-presnt
You might want to do some more research before deciding what you would like to cosplay as. If I was you I would try to stay away from doing VietCong just saying.