Hi Chris,
I recently asked my LHS what the status of the Gunze range was and whether they knew if the importer was planning to replace the now missing part of the range with the Mr Color lacquers. They didn't even know that Gunze had another range of bottled paints. The only lacquer paints they were aware of were the spray cans.
Tamiya's paints (colour-wise) tend to be "close but no cigar". They have recently (I think within the last 6 months) released a number of colours specifically for WW2 RAF applications (perhaps to go with their 1/32 Spitfire) but otherwise, they don't have specific (ie. FS, B.S., RLM/RAL) matches.
The only Aussie hobby shop I am aware of with a reasonable range of paints is Frontline Hobbies in Newcastle - They carry Vallejo, Lifecolor, a now shrinking range of Gunze Aqueous and Tamiya in acrylics. (I haven't actually been there, I am just looking at their website).
I too would like to know if we're going to get the Mr Color lacquers here in Australia. I have seen some of the Mr Metal Color range here though.