Not really rare or limited, but I'm not aware of how many pairs were released in Australia. (if any at all)
I'd hazard a guess and say that original retailers (US) are sold-out as they came out over 3 months ago, but there are still pairs to be found on eBay, SoleCollector.com, and various others.
As for being ok to play in... that depends on what type of shoe suits your game.
Best I can say is get them, then if you don't like playing in them, you can always just casual wear them.. they are awesome looking thats for sure.