You can order online, just go to the individual sail pages, scroll down to the bottom and you will see a "buy now" tab. 2016 is online.
www.kasailwindsurfing.com/en/Mark Jordan in NSW resells and Steve was in WA . 2016 sails not here yet, probably second week of October but you are best to contact Peter....peter@kasail.com as I am not up to speed with the sales / business stuff, just do the fun design stuff.
Obelix, what mast do you have?, I should be able to tell you if it will work or not.