| IIRC only the 998r had a carbon seat unit as they came out of the factory.
The 748r and 996r look very similar but the 998r is different, it doesn't have the vents in.
Sold a 998r seat unit a couple of years ago for around the £450 mark.
They do come up from time to time on Fleabay or on the various Ducati sites.
Ray. | 
Threaded Mode