I thought my clutch was shot too
For me it turned out to be the throw out bearing that was shot not the clutch. The noise was intermittent, it happened mostly when I shifted or was stopped with the truck idling. I would pump the clutch and sometimes it would stop the noise. I thought my truck was out of control. I bought a standard Luk kit and yanked the engine, (I know most people would pull the xcase and the transmission, I've never done that but I had pulled the motor, I went with what I knew. ) I was mad because there was plenty of the original clutch left. This is my best guess at your problem. I have not looked for just a throw out bearing (I wish I did) but I would imagine you can find it somewhere.
Good luck with it.
Art