I think if you ring around a bit you'll find an instructor that will accept that being current on a 737 and operating in an airline under its check & training regime is probably reasonable evidence that you know how to fly. A guy like that will take you up and fly the approaches and not worry at all that you try and flare the aircraft 50 ft too high.
This is primarily an exercise to satisfy CASA pedantry. This exercise is (or should be) a soda compared with your airline's check & training regime.
Frankly, the instructor costs, test costs, CASA fees, etc dwarf the cost difference between aircraft hire & simulator. I'd look for the right guy and use whatever suits him best.