Regarding
'Get Around Downtown Girl – Johnny Garrett & The Rising Signs'
Freddie & The Dreamers of all people did a cover of this! It was amongst the small number of songs I found listenable by them (a cover of John Carter's 'Smith & Porter's meat exporters Van' was another).
Maybe they're including Australian releases of artists from other countries or else have a related Australian connection. There's several American artists I think.