Daihatsu Sirion GTVi clutch

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Hi I have got a 2000 Daihatsu Sirion GTVi with about 90000KM on it. A great little car fun to drive and economical. I have noticed a crunching sound when I push the clutch in, at first I thought it was the clutch cable but I can hear the sound clearly coming from the selector area on the gearbox. I am suspecting the clutch will need to be replaced. Anyone had similar problems? I am in Australia and understand it will cost around $1000-$1200 to replace.
Also is there a service manual available? thanks Spin