Re use of overseas simulators, it's all in Part 142.
The process to have an overseas training facility approved by CASA is easy.
Simply obtain a copy of the facility's exposition, current simulator approval and fidelity status, the syllabus for the course you propose to complete, fill in the application and wait for the CASA quote.
Their quote will be all-inclusive of FOI review time (currently $160 an hour), visa application fees, business class travel, per diems (at the ATO maximum approved rates) and five star accommodation. Plus, you may be the beneficiary of the CASA FOI's wisdom as he observes your training and check ride.
Or, unless you seek a rating on an exotic type not supported by a local simulator, you could stay closer to home. We do have simulators in Australia that cover types that you are most likely to need for a job.