For more info on what happened with Dore going into administration / liquidation, try these blogs:
Brainduck http://brainduck.wordpress.com/category/dore
Gimpy http://gimpyblog.wordpress.com/?s=dore
HolfordWatch http://holfordwatch.info/?s=dore
Podblack http://podblack.wordpress.com/?s=dore&searchsubmit=Find+%C2%BB
Bad Science http://www.badscience.net/?cat=72
Dore Australia was illegally trading as insolvent from Jan 08, Wynford was warned about this and had a legal duty to prevent it.
You aren't going to get money back either in Australia or the UK from DORE itself, as the companies you had a contract with no longer exist. The blogs above have some advice on how to get money back from other sources (credit cards, Govt schemes, etc) - try Podblack for Australia and Brainduck (mine) for the UK. However, you should also contact the administrators Woodgate in Australia, Kroll in the UK. Woodgate in particular has a very interesting report (no longer online but I will email it to anyone who asks) describing exactly what happened in financial terms.
Sorry I can't give you better news, and good luck!