Hi heaven,

Unfortunately it looks like the DTPa formulation without polio is no longer available in Australia. It was called Infanrix (you used to be able to get diptheria as a seperate immunisation, as well as tetanus by itself as well.) You can get polio by itself, but I do not know if the formulation is suitable for children. I actually remember giving infanrix with hep B formulation so it stopped being used sometime in the last 9 years.

The people to contact would be the health department in your state to see if it can be imported for you as you may need permission to do this.

This site lists the vaccinations that are registered here but are not available for use:

Immunise - Appendix 3: Products registered in Australia but not currently available - updated July 2009

And this one lists the contact numbers of the various authorities in each state:

Immunise - Appendix 1: Contact details for Australian, State and Territory Government health authorities and communicable disease control

I hope this was helpful to you.