The Medivac version with wounded soldier lying on stretcher could be used to represent an Australian medivac in Vietnam. More Australian wounded would probably have been medivac'd by US Hueys than Aussie ones.
Australia had about 16 Hueys in Vietnam and initially there were issues with how they were deployed as they were very cautious due to their limited numbers. This was not the fault of the crews but the operating guidelines. The Americans had nearly 12,000 Hueys and could respond quickly to requests for help much quicker. As a result the majority of Australians who served in Vietnam would have experienced more engagement with American rather than Australian Hueys.
About 17 years ago I commissioned an artist, himself a Vietnam infantry veteran, to paint a Dustoff painting. Naturally the Huey was in the markings of 9 Squadron RAAF. When it was finished we took it to an Infantry Association gathering. The first Vietnam Veteran who came up to look at it straight away said "wrong markings". I asked what he meant. He described an incident where one of his platoon was wounded and needed a RAAF evacuation which was declined due to the proximity of the enemy. As the radio debate was going on an American pilot nearby said he would step in and carried out the medivac. The infantry guy said his experience was that he never saw an Australian Huey operationally and as such the painting did not represent what he saw. This was a bit of a surprise to the artist and myself but backed up by further conversations with quite a few veterans.
Soon after we went to Canberra and visited the Vietnam Memorial. There is a very large image of a Huey as part of a collage on the memorial. It is an American Huey^&confuse. This is the cause of some angst for 9 Squadron veterans and it does seem odd not to have chosen an Australian image. However some of the iconic Australian Vietnam images show American Hueys and the memorial image is taken from one of them.
Having said that 9 Squadron did good work with the SAS and particularly dropping ammo under fire during the battle at Long Tan.
Have met a Veteran who lost both legs in Vietnam and he said the best sound he ever heard was the Huey coming in to medivac him. In his case it was a 9 Squadron Huey but the image he had in his office showed a bunch of American Huey's with his battalion (the iconic 7th Battalion image used on the memorial).