Here in Austraila the rebuild cost is approx $100(AU).
Ouch! Why so much? The "g" springs are just a few bucks here in the US. Any good Campy dealer should take no more than 1 hour to replace them. I've replace springs on several campy levers, its not that hard and not that pricey.
From the Campy only site: http://campyonly.com/howto/ergo_rebuild.html "Need a Rebuild? (But don't want to try it) For $25 plus parts, Branford Bike will rebuild your lever for you--or change your 9-speed levers to work with 10-speed, your 10-speed levers to work with 9-speed, or your 1999-2000 levers to work with 8-speed. Check out their web site for more info:" http://www.branfordbike.com/campy/campy.html#Upgrade