Looking through Zero Tackle (http://www.zerotackle.com.au/rugby-l...contract-2011/) at off-contract players, seems the following hookers could be available (in no particular order)
Paul Aiton
Ben Hunt
Andrew McCullogh
Glen Buttriss
Ryan Hinchcliff
Aaron Heremaia
Lance Hohaia
Isaac De Gois
Clint Amos
James Segyaro
Aaron Payne
Masada Iosefa
Beau Falloon
Jake Friend
Mark Riddell