Welcome to Just Commodores, a site specifically designed for all people who share the same passion as yourself.
Do yourself a favour, and go to an Autopro or the like and grab the Holts Dupicolour someone mentioned above. You get a spray can for bigger jobs which is three times the size of a normal Holden touch up bottle, plus it comes with a small brush for touch ups.
And it's only $11, compared to about $15 last time i checked for a small bottle at Holden.
Just make sure you have the code and the name and they should be able to help with little to no worries.
So in Victoria? A shop like Auto Pro? never heard of it...
Melbourne is a country within itself really it's pretty isolated from the real word