Matt
I suggest you get hold of THE HISTORY OF HOLDEN by Norm Darwin. Your local library will help
http://trove.nla.gov.au/work/2146067...ionId=25704039
Although the book is horribly written in my opinion, it does have lots of relevant info.
There is a pic in the book, of 1940 Chev sedans with girls standing in front , all are painted in civilian livery ( the cars not the girls ! )