Contact Aviation Australia
Aviation Australia as they do the assessment from CASA basics to Part66 . Another option is to see if your eligable for the CTC exams . If you take the CTC exam option take a course at QAC
Queensland Aerospace College (QAC) - Accredited Aircraft Engineer Training
Personally I think the whole EASA scam is money making racket . I contacted a UK university asking about their top up degree in Aircraft engineering and since EASA doesnt recognise the Australian Part66 then I cant take the course . Also the syllabus is a quarter of that of the old CASA system (there is only one topic on radios theory , where there is 12 exams in old CASA system) .Useless money making paperwork thats going to dumb down the industry
Anyway good luck with your converstion