why would you do asymmetric training in the air when you have simulator facilities available for that purpose
While not the perfect solution, there is probably a flight safety case for using a KingAir or Metro simulator both of which which are already available in Australia if the prime purpose is to assess the applicants competency at conducting a simulated engine failure on take off.
The physical handling characteristics such as identification, foot-load, V-speeds and instrument indications would be similar even though switch positions may be different. Pulling back a throttle to simulate an engine failure after lift off in any turbo prop twin is fraught with danger as the statistics have shown already.