The RAAF aircraft that was not wanted nor ordered was the Douglas Boston bomber, a variant of the A-20 Havoc. Australia had a total of 69 Bostons, operated by No. 22 Sqdn. It had the Serial No. prefix A28. The details of how we came to acquire this aircraft can be found at Douglas Boston.
There is more information here - RAAF Museum, and from Wikipedia_
42-86786 - RAAF Amberley Heritage Centre Queensland. To be held at Amberley until facility to hold aircraft is built at Papua New Guinea National Museum in Port Moresby.
RAAF A28-8, RAAF Sqn Code DU-J, RAF s/n AL907 - RAAF Museum, RAAF Base Point Cook in Victoria.
42-86615 - under restoration at the RAAF Museum, RAAF Wagga in New South Wales.
Thanks SP, but i'm still not much better off.
I Googled it, but could not see what it was a conversion from.
It's sure gonna need a big resto job if it's ever going to be operational again.
Probably accruing a decent amount just being parked there.
Looking forward to seeing the Catalina VH CAT operational again, if i'm around that long.