Snaggs,
You didn't wait very long for a reply to your question. You must have been in a dire need to purchase a new car.
B100 in Perth
Look up Bioworks in the phone book, or just visit their web site
Welcome to BioWorks and you will be able to buy B100 from them in 20 litre and larger containers.
In Miidvale, a bloke called Rob Penfold is seling around 3KL of biodiesel a month. I can provide contact details on request.
Or
Join the WA Renewable Fuels Association and learn to make your own.
Contact me on 0428 920 881 to discuss your options.
Regards,
Tony