yeah, i get that. call rocket and ask them, they'd be the best to point you in the direction of a wa-based distributor (if there is one)
from the above link off m/t website-
International Dealers
Authorized M/TŪ Dealers in AUSTRALIA
ROCKET INDUSTRIES
P.O. Box 6670
Blacktown, NSW 2148 Australia
Phone: 612-8825-1900
www.rocketindustries.com.au
Dealer Type = Street & Strip
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EXCLUSIVE TYRE DISTRIBUTORS
P.O. Box 101
Moorooka QLD 4105 Australia
Phone: 61-7-3272-9888
www.mickeythompsontires.com.au
Dealer Type = Truck & Off Road
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or if you don't wanna call rocket... fill this in-
http://www.rocketindustries.com.au/contact.php?id=1