I think IAS is probably the best bet for what you want:
http://www.iasbet.com/
To save you some time, here is the AFL page:
http://www.iasbet.com/Sport/AFL/

You can look at Sportingbet too though.
http://www.sportingbet.com.au/
And the AFL page:
http://www.sportingbet.com.au/Sport...1&Step=1&Nav=10