The late Bill Moore (Country Buggy Bill) had some Australian production records, but very incomplete. He actually went to the archives at Wolfsburg and looked, but they have no Aussie production records. Jurgen Seil used to work for LNC Industries also has some rudimentary annual totals. He is now retired, lives on the mid-north coast and is involved with the Tea Gardens Motorfest. Some Melbourne guys also have some incomplete records, usually handed down from men who once worked at the Clayton plant. There are some production totals in Rod and Lloyd Davies' book 'The Forgotten Story', but only for a few years and only overall totals. No one has anything like complete year-by-year production records, broken down by type.
I came across these limitations many years ago when I was researching the Australian VW history. The only thing I could do was locate annual SALES figures, which I found in old annual reports of the Chamber of Auto Industries. You can find these in the State Libraries of NSW and VIC, and the National Library in Canberra. There are also some VWA and LNC annual reports too if you look hard enough. The figures I found are published, year by year, in the VW history pages here:
http://www.clubvw.org.au/history
Click on the 5-year block you are interested in, and the sales figures for that year are at the bottom of each year.
Because they were published by the FCAI, according to their own classifications, there are limitations to these figures. For example, they never recorded a model called 'Beetle - they recorded sales for the 'VW1200' and 'VW1300'. There was no breakdown between Deluxe and Standard. From 1963 you'll also see 'VW1500', which was the Type 3. No info on how many were sedans, wagons or fastbacks - that info doesn't exist. From 1968, when the Beetle went to a 1500 engine, they still just recorded sales for 'VW1500'. BUT - that must also include Type 3 models. Sadly there is no way of knowing how many of the 'VW 1500' were Type 1 and Type 3. Same from 1971-74 when 'VW1600' must include both Superbug and Type 3.
Likewise Transporters - no way of knowing how many were vans, Kombis, Microbuses or pickups. It's a shame, but there it is. Even today, VFACTS does not say how many Golf totals are petrols or diesels, or how many are GTIs. We only know how many 'Golfs' were sold.
Yes it's sad but it wasn't a case of foresight - it was purely multiple changes of ownership. When VW Australasia was dissolved in 1968 and replaced by 'Motor Producers' Ltd, and LNC Industries in Sydney taking over distribution and sales, the Clayton plant was stripped out and converted to assembly only. The Clayton 'Plant 2' that used to be the admin office and parts store was emptied and sold (and later demolished for a new industrial estate). Lots of stuff was apparently dumped at Dandenong tip. And whatever survived would have been thrown out when Nissan took ownership of the plant in 1976-77. Today it's been split into a Linfox depot and the HSV works. As for the Sydney office, it closed in 1987 when LNC lost the VW franchise and they went out of business in 1990. That site was also demolished and is now a business park. Ateco only had the VW franchise for 2 years and had no historical VW stuff at all. Likewise TKM, and Inchcape, that followed. Today's VW Group Australia has only existed since 2001. They have no historial records and they come to US for historical info!
What I'm trying to say is that no, there are no dusty filing cabinets of VW stuff waiting to be found. They were all destroyed or disposed of long ago.