[kaisen]

There is a good used clutch and DMF on eBay for $290 BIN
Porsche 968 parts Flywheel and Clutch Package OEM - eBay (item 180635649097 end time Apr-04-11 15:40:49 PDT)

Or just a good used DMF flywheel for $85
1993 Porsche 968 OEM Flywheel - eBay (item 250753382125 end time Apr-06-11 18:13:32 PDT)

Or a new Fidanza flywheel for $370 (11lbs vs 27lb DMF)
FIDANZA FLYWHEEL Porsche 968 1992-1995 3.0L - eBay (item 120310423088 end time Mar-15-11 10:39:53 PDT)

Couple that with a $670 new Sachs clutch kit
OEM Porsche 968 - Clutch Kit 92-95 - eBay (item 390185750529 end time Mar-17-11 00:41:25 PDT)

So you're $400 to $1100 in parts

Here's a great write-up for the labor involved:
Clutch - Porsche 968

It's a 3-5 hour job