I'll post the reply, since SACO was right:
Wal Anderson Buchanan Repco-Holden special built 1957 in QLD by Wal Anderson. Raced by Wal Anderson 1957-58. Owned by Greg Smith in Melbourne, discovered the remains under a MGTF special, original body has since been located along with all the missing bits and these have all been authenticated by Wal's son who worked on and drove the car and now lives in Melbourne. Built on a Lotus MK6 replica chassis built by Stan Brown and Alex Strachan in Sydney
(I had the answer ready, but SACO beat me to it for few minutes!)