BR,
If you live in Oz and want to fly 1900's, show up to Impulse with 8k cash and tell em you want a job! It has been done many a time with them...Ignore their standard letter about "keeping you on file for future vacancies", just hassle them out until they listen. If you are worried about the cost of a B1900 rating, consider the expense of travelling to Dubai and funding your stay there until Falcon give you a go...it might work out for you in the end, but I would think Australia still has some good opportunities, in Aus it comes down to how determined you are.
Either way, Good luck
Just curious, whats your Total Time and Multi time?