The NSW BDM (free to search)has his death registered as follows
52969/1972 APPLEBEE RAYMOND LESLIE father LESLIE NORMAN mother BETTY MAY district WAUCHOPE
If you want info in the certificate hire a trancription agent as it's cheaper
There is a death notice in the SMH on page 38 of 16 May 1972 http://news.google.com/newspapers?nid=lL5f5cZgq8MC&dat=1...
"APPLEBEE, Raymond Leslie- May 12 1972 (result of accident)beloved brother of David, Jeffrey, Gary, Janelle,Gayle, son of Les, aged 23 years
Raymond's father, Leslie Norman was a miner (based on the electoral roll. He lived at The Oaks (Note: Betty is not listed with him)
Name: Leslie Norman Applebee
Electoral Year:1958, 1954 and 1949
State:New South Wales
There is a private tree here that lists Raymond. Get in contact with them and they might know more http://trees.ancestry.com.au/pt/RequestTreeAccess.aspx?tid=1...
Good luck in your search