Speednews does list 35 airplanes, but look at the delivery dates. Not too many available before March. Those that are might not be priced right, might not have the rudder or center tank mods done etc etc. Usually if an airplane is listed as immediately available it means it is parked in the desert in Arizona or somewhere. Some would be on a storage maintenance program and the real cheapies may not be. From a good storage status it would be a few months and a lot of dollars to get one up to CASA standards. If not on a program, no amount of time and dollars short of a total restoration would fix it with CASA. The good news for the bottom end of the market is that in the longer term old 737's should get cheaper as Air Asia dumps their big fleet on the market.
And none of the currently available are ETOPS. Qantas and Air New Zealand would not be so silly as to sell theirs in to the local market. Makes trans Tasman expensive if not ETOPS.