Thanks, Tiger might be a good option to look into.
Effectively, CASA don't recognise the "CPL frozen ATPL" element of the EASA system so if you don't have a Type Rating then you just go over with a CPL and have to complete 12 more exams to qualify for a CASA ATPL.
To avoid this, a Type Rating to activate the "Full" ATPL means just Air Law exams are required to cross over to a CASA Licence. If the Type Rating was cost effective, it could mean getting a job months sooner (and not revising for more ATPL exams!)