Sometimes pressure plates (the contact plate itself) can be resurfaced too. Or if one can find a replacement (I easily found 3 different sellers on ebay at the moment - see below), you can get an NOS replacement "contact plate" and provide it with the existing pressure plate assembly to a rebuilder for restoring to as new condition.
A check of some Chevy Master Parts Books shows the clutch pressure plate assembly for your 9-bolt "heavy duty" unit to be cast on it as "838949" (at least on earlier 1938-52 heavy duty pressure plates), which matches all the ones I found offered in these sales:
5 available at $27 + shipping - Located in Tonganoxie, KS (not far from me)
1 available at $69.95 + shipping - Located in Eldorado, KS at Bowtie Bits (which is now owned by Jim Carter)
1 available at $45.00 + shipping - Located in Olney, IL
Just my $.02 worth, but I'd offer the flywheel, clutch plate and pressure plate as a package deal. Or at least the clutch plate and pressure plate as they can both be rebuilt/restored.
