AlpineYve - you might just put your Australian state in. That gives us more help in trying to find you a rose. However...Kebun is right. I don't think 'Charmaine' ever got to Australia as I have checked Hazlewood's catalogues for 1930, 32, 35, 36, 37 and 38 and they didn't list it. However, I have added more references for 'Charmaine' and the 1934 from Alex Ross is interesting. You might just do a double check with Ross Roses in South Australia.
I have also checked Charmaine against the Ruston Roses National Rose Collection database in case there might be Charmaine budwood available. Charmaine is not listed but it might be worth giving Rustons a call nonetheless... who knows what might be uncovered!