We are making progress on the records search at the National Archives of Australia for the flying jackets contract reference located by dinomartino1, though a bit slower than originally expected. To quote a recent note from the researcher I hired "I thought the search would be fairly straightforward but have found that the papers are arranged in order of when they were considered by the Board." We don’t have the slightest idea [yet] what the reference 10,776 Req. 18669 meant in the Commonwealth of Australia Gazette of 24/6/43 that dinomartino1 found, but the actual supply reference seems to be in Business Paper 8605 of 19/5/43. I asked the researcher to find the related contract documents for the Business Paper reference and will let you know when I hear back. The search may take a few more weeks, as the documents aren't ordered.