Hey Shonan,
Sorry, forgot to post the lin.
The short trade data can be found at:
http://www.asx.com.au/data/shortsell.txt
It is typically updated mid morning for trades on the previous day.
I then reconcile that figure against the total volume traded as shown by my trading platform.
Shame is that report used to be much more comprehensive, but the ASX diluted its content a few months back.
Hope that helps.
Mo