so does my one in my 944
My clutch is 22 yrs old. it has a rubber centre and they're notorious for the rubber deteriorating and falling to bits before the clutch wears out and this is what happened on Labour weekend
I haven't driven it since as its on the 'get-home-tabs' which makes it driveable but very noisy engagement and power comes on with a real thump. Plus I don't know how long I can drive on those tabs, so I don't.
The rubber centred clutches have long been superceeded by a sachs spring centred clutch.
The place i used to get my new parts from which is generally the cheapest for new porsche parts in NZ quoted me $950.00 + GST for a new clutch disc!!!
A place I go to in the US quotes NZ$504 for a clutch disc. Our $ is so **** right now. I knew the clutch would be a job i may need to do in my first year of ownership when i got the car in March. If I bought then, I would have saved myself another $130.00!
 on top of that, changing the clutch is a whole day. have to disconnect the half shafts, disconnect the shift mechanism, disconnect the bell housing, drop the transaxle and torque tube- do the clutch and then reassemble
For the ones that don't know, car goes: engine, clutch/bellhousing, torque tube, transaxle. The torque tube is full of bearings and spines at engine speed. this is an example of a fabricated light weight one: