I do not know how this is going to work but herewith is a copy of my CMP database, colected from all over the world. I hope it is of interest and I really must thank all of you who have contributed including Keith!!!
http://clubs.hemmings.com/clubsites/...evdatabase.htm
Note that the Holden-assembled chassis varied in their chosen styles! This was the same post-war as well, and the location of the local plant code varied. Also there are no known so far Adelaide plant codes BUT Adelaide may not have used 'A'...thus the absence of the plant code does not mean that Adelaide plant did not assemble any trucks. There were some plates that did not have a code letter, and also some plates had the Oshawa plant serial number and stuck with it. Finally, there are known examples of chasis numbers with the same sequential numbers but different plant codes distinguish.
Note also that NZ and South Africa used their GMOO Plant codes in the X series...India may have done the same if not did do so!