Shortly before joining AC/DC, Bon Scott recorded a song called Round and Round and Round will the Mount Lofty Rangers.  There was also a music video.

The video is below.

Round and Round and Round is now available on iTunes.

This is not the first time pre-AC/DC era music featuring Bon Scott has surfaced.  But, this is the group he was with just prior to joining the band he is most famous for. 

He left a Mount Lofty Rangers rehearsal in a drunken rage on a motorcycle.  He crashed and was in a coma for three days.  He never returned to the band.

He joined AC/DC a few months later.

Scott died on February 15, 1980.

Bon Scott - Round and Round and Round on MUZU.TV.