I dont know their hardness, Looking at the design its identical to Prothane/Whiteline for the Nolathane.
I assume they match Powerflex yellow compound which is somewhere 70A to 80A. I Also assume //M bushings are less than 95A, sicne powerflex lists 95A an upgrade to 1m
Powerflex purple is around 80A
Powerflex Black is 95A
Another Australian option
SuperPro SPF3946K Subframe to Chassis Mount Bush Kit ( google says 80A-90A range for their bushings)
other superpro bushes:
http://www.superpro.com.au/trade/?vi...istSeries=2224