I believe the reason why it isn't on sale here is Oz is because it would cannabalise product that they already make very good money from (VOLTAREN) if they sold the Voveren with TPM product here they would have to pay royalties to POH, something that they don't have to do now.
And yes it is the best product that my family and friends have used and Voltaren runs a very distant second when compared to it, there is no doubt there whatsoever!