I can't tell you what the colours are in your Australian colour system, but I can tell you what colours they are in the German RAL system.
The RAL system is German by origin but it's the most well known and world wide adopted colour system, so anybody with access to a computerised paint mixing machine should be able to mix these colours for any brand of paint you prefer.
Tools: very dark blue, RAL 5004 (Black Blue)
Systainers: light grey RAL 7035 (Light Grey)
Green: RAL 6018 (Yellow Green)
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Also, any (good) paint store should be able to get you an almost exact match of the colours if you bring a sample to them. Even if you don't have the official names/numbers of the colour.