Hi Bex
I did as you suggested and emailed Dr Imbeau. i got a quick response and was advised to contact the distributor in Australia:

Biodent
DRM Australasia PTY Ltd.
1-800-041-748

I have rung them and spoken to Ester. She confirmed they are the DRM Diamond distributor. Apparently they are located in Queensland. At present they are in the process of building a webpage - it will be www.biodent.com.au. She took my email and homephone number and said she would email me what she could find out about which Dentists (particularly those located in Perth WA) are using the products. She was happy for me to post those details on the forum for the benefit of all.
So when & if I get a response I will do just that.So a big thankyou Bex at least I will find out if anyone is using it and if not try and convince someone (provided it is the preferred biocompatible product for me).