Another maker does Vietnam era figures, there were 3 sets produced here in Australia by Gun-Ho orginally as plastics and then in metal. The sets each has 8 figures and were of the NVA / VC, US and Australians.
I prepared an article in Toy Soldier and Modle Fiure magazine a couple of years back and featured images of those troops as well as the current Figarti figures and the K&C from about 10 years ago.
Here are the images of the Gun-Ho that I painted
I've tried to contact Gun-Ho for a while, but I can't get any reply, either from email or leaving a message on the phone, its a pity, as he did promise that he would be producing more Vietnamese, and they would be great to add into the paddy fields!
regards,
John