There's a copy of the following for sale:
Australian Army. Army Colour Patch Register 1915 - 1949 Defence Centre Canberra 1992 Defence Publication 126/93 Card covers folio unpagingated (about 3cm thick) b&w line and colour illustrations of colour patches, fold outs. Some wear on covers and creased corners. Else very good. Stamped 00003 on title page. Scarce $175
This is an extremely limited publication, almost unobtainable under normal circumstances. You can get it from here (and I have no financial connection with the vendor):
www.alexanderfaxbooks.com.au