MasterCard Internet Gateway Service (MiGS)
This would cover many banks and financial institutions.
Christos Amarandos commented
Take a look at this http://codecanyon.net/item/mastercard-migs-for-woocommerce/5815316
The price has been reduced.
Thanks for the input.
This plugin is available here: https://www.charliesgarage.com.au/payment/paymentform.php?software=6&bank=A&type=Code
Matthew Keath commented
The link provided above is over $200 for just the code, and $600 for them to install it for you. It's highway robbery.
I look forward to this plugin as well.
Alan Reddick commented
I'll second that. Most banks in Australia resell MIGS.