This remote control is now obsolete and your working original must be copied onto the Multi-frequency Duplicating Remote to replace your garage door remotes. Pictured below (click on the thumbnail to enlarge).
It will be delivered complete with battery and DIY programming instructions.
Postage via Australia Post regular mail service is free, but un-trackable and can be slow outside of capital cities. You can upgrade to Express post for $11.00 during Checkout if you wish.