I've been closely involved in the surf industry in Australia and its rare that new footage emerges but this has turned up from the 1964 World Titles at Manly Beach .... enjoy!!
FYI: There is a massive dichotomy in the Australian (and global) surfing industry and "surf music" ... this almost makes the twain meet.
http://aso.gov.au/titles/sponsored-films/king-of-the-surf/clip1/?fb_action_ids=10152879443256025