This is not a sponsored link, I just really like this site. badbacks.com.au offers a wide range of back pain related products:

Pillows/Beds

Computer Workstation/Ergonomic Equipment

Braces/Straps/Supports

Hot and Cold Therapy (Ice Packs/Wheat Bags etc)

Inversion Beds

Sports (Taping, Gels)

Rehab Equipment

There is a store in Alexandria you can go to if you want to check out or try any of the products.