Hertz - Are any coupon codes good for Australia?

Almost every car-rental coupon I get is valid in North America, sometimes other areas, but I haven't seen Australia. I'll be renting for 2 weekends in Australia in July, in SYD and PER, so if anyone has any discount ideas, please let me know.
I rented a car in SYD last year and it was great--much easier to get around than I thought it would be, and not too expensive.
Thanks!

http://www.qantas.com.au/content/dyn/info/bookings/cars/hertz A few deals that might work for you.

My local AAA also has a coupon for One Car Class Upgrade (subject to avail, min 3 days, and valid on Econ. to full, manual shift only (excetions may apply) )
Asia/Pacific/Africa PC #172723
Canada PC #172804
Europe PC # 172561
Latin America/Mexico/Carribean Pc #172550
Puerto Rico/St. Thomas Pc #172675
CDP 5
Expires 6/30 - might be of help to someone else looking for an international PC

bump-anyone else know any? I'll be renting in SYD from 1st to 3rd July.
Thank you!