The Design course at COFA was asking for about an 88.10 last year. If you want to combine it with Art Education (which would be a good idea seeing as it only adds one extra year and you get two degrees instead of one) they wanted an 88.2. However after the first round the cutoffs actually went up to about 90.1.
UWS also has a course for B Design (Visual Communication) which UAC 2010 said requires an ATAR of 63.45.
The UTS course for B Design in Visual Communication asks for a 95.05.
You can also do a B Graphic Design or B Digital Media at UOW. The was a combination of ATAR and other criteria need.
In the B Design course at COFA you can choose your two majors in your second year. You can pick from graphics media, textiles, jewellery, applied/object, environments and spatial, and ceramics. I'm pretty sure that if you do the double degree you only pick one major from the Design half of the course.
Also look into Enmore Design Centre TAFE.
Design Centre Enmore | TAFE NSW Sydney Institute