Hi Centaurus
There were 3 C310 rainmakers that I know of; VH-AER, VH-REK and VH-REL.
REK and REL taken at the end of their delivery flight on 5 Dec 57:
At Tamworth with rainmaker Hudson VH-EWR:
VH-AER is preserved by the Moorabbin Air Museum.
VH-REK is preserved by HARS.
C320 VH-DRK was last reported in Denis Beahan's yard at Roma in 2003.
Another lesser-known rainmaker is Beagle 206 VH-UNL which is preserved at the Queensland Air Museum.
Rgds