Couple of options to explore.
Jim at Intel Cargo phone 9541 6886 is very reputable and worth a quote.
Pete at East Coast Mustang Parts in Lilydale has an import service West Coast to Melb for $3,600 phone 9737 6050.
Whoever you use make sure it's on a fast boat, which might cost a bit more, but you get to see your car this century.