I wonder if you know about this one, preserved at the Al Mahatta Museum, on the site of the former RAF Sharjah in the UAE. They have 4 aircraft painted to represent early Gulf Aviation machines. Their Heron is ex Australian.
The Heron "G-ANFE" is actually constructor's number 14072, a Heron 2 originally owned by West African Airways Corporation, as VR-NAQ. It was then registered G-ARKU with Overseas Aviation Ltd. In 1961 it was transferred to the Royal Navy, and converted to a Sea Heron C20 (XR443). Withdrawn from use in 1989 it was sold as G-ORSJ, later changed to G-ODLG. Sold again in 1993 it became VH-NJP with Heron Airlines in Australia. It was acquired for the museum and painted to represent G-ANFE in 2003. There is a constructor's number on a plate just behind the co-pilot's head "14072", and also there is a hand-written "NJP" on the captain's roof.
I have some photos, including some of the interior and cockpit. Do you want them?
Laurence