ORBX has started to accept pre-pay orders for the FTX Gold Central Rocky Mountain scenery area that will get you a 15% discount when the software is released at a later date. That comes out to $37.26 USD. Be aware that there will be some international fees for credit card purchase I'm sure but around $40 is not bad.
Do not know how long before it will be released but usually takes around 6 weeks or so after announcing pre-pay.
http://www.flightsimstore.com/product_info.php?products_id=1754This link should take you to the pre-pay screen of the Australian Flight Sim Store. It is NOT ready for download at this time. You pre-pay and will receive an email when it is released and ready to download.