That is Prototype Number 4 not Number 1.
Number 1 was restored by the Strongman's and as the article reads it's "now owned by the National Museum of Australia"
I have original parts off Number 1 right here in my office (part of my prized Holden and NASCO collection) that I purchased from the Strongman's more than a decade ago.

Still a very cool car with a lot of history. But again like that Bob Jane HQ wagon will only hold appeal for a certain few.