It has just come to my attention that the the Crystal and Steel Black DualShock 4 controllers are in Australian stores today. You’ll be able to get them from at least EB Games and JB Hi Fi for a RRP $99AUD. You should also be able to find the Gold and Silver variations restocked.
In my opinion, the Crystal controller is absolutely stunning, even more so in-person. I’d suspect based on previous special edition controller releases that they won’t be in stock for long. Go crazy.