In Lincraft's "red tag" catalogue sale starting Monday 9th April, they are having a clearance of Tablet and Laptop bags and cases. They are marked down 50% which is pretty good considering their normal price was pretty low for these good quality items. I have bought these in the past and they had a variety of Case Logic brand cases available, there may have been other brands too but I'm not sure (they also had student bags and CD cases but I don't think they are included in the clearance). I'm guessing you'd be paying $50 or so at Officeworks and JB HiFi for comparable cases. From memory, they had 12" and 15-16" laptop bags, and 10" tablet bags when I last saw them.
On sale 9am Monday 9 April to Wednesday 18 April.