If you are in the local Sydney area I should have a good second hand set you can have for $35
Otherwise
Rockauto has the URO mounts for under $150 for the pair shipped to AUS
http://www.rockauto.com/en/moreinfo.php?pk=1099486&cc=1289044&jsn=390
FCP has these
https://www.fcpeuro.com/products/volvo-engine-mount-front-left-or-right-740-760-780-940-uro-parts
which again should be under $150aus shipped to your door