Oriel - good question!

Interior Design at QUT, Brisbane.

Offers 4 years, fulltime, course fees approx $28,000.

http://www.bee.qut.edu.au/study/courses/course-major.jsp?major-id=7258

Bachelor of Design at UTS, Sydney.

4 yrs full-time.

http://www.handbook.uts.edu.au/courses/c10057.html 

Interior Decoration & Design at RMIT, School of Design (TAFE),  Melbourne 

http://www.rmit.edu.au/interiordec

Also at RMIT: Printing & Graphic Prepress http://www.rmit.edu.au/printingprepress, Visual Merchandising, Art & Graphic Design.  All Diploma Courses.

Fabric Design School, California.

Including fashion fabrics, home fabrics, packaging, paper, wallpaper. 

http://www.fabricschool.com/