"Tap Tap" came out in 1977 on an Albert's single and has not yet made it to CD. It was in its day released on two vinyl albums, Australia's Greatest Movie Hits and the Picture Show Man Sountrack and as far as I know both albums have not been on CD.
The composer Peter Best best won the Australian Film Institute Award for Best Original Music Score in 1977 for the movie soundtrack. Peter also wrote the music for another movie which starred John Meillon and Paul Hogan, "Crocodile Dundee".
"The Picture Show Man" is a witty comedy movie set in the 1920s and it chronicles the adventures of Maurice Pym (John Meillon), a flamboyant showman traveling the NSW outback unreeling silent films. Braving much hardship and heartbreak along the way, Pym soon clashes with rival showman Palmer - a loud-mouthed, super-cool, ever-smiling American (Rod Taylor)...and it is "G" rated.
On the Australian Film Sound Archives website there is an mp4 clip from the movie which has John Meillon singing and tapping in a music hall in northern NSW. The movie version is very different to the single.
They are in a zip file which doesn't have a password. Both at 320KB quality. Enjoy!