Here is the Crankshaft Position Sensor on eBay.au (from Rockdale) at $99.90 + $8.50 postage

Here at Mick's Garage (a UK site that ships to Australia) there are 3 makes from $82 to $125 plus shipping at a fixed rate of $24.50.
SWAG, Febi, or EGA ??

Here it is from Europarts-SD for about $60 ($US 41.50)