Cheapest clutch I've found so far is Eurospares at about £1160 with delivery.
Eurocarparts want nearly double that, though their more or less constant X% off sales bring that down to a touch under £1,400
I contacted the Maserati dealer that lists on eBay about 8 months ago (Nottingham?) and they were similar back then.
My plan is to retain the old one and possibly get it re-surfaced which again, about 8 months back, was around 60% of the total cost, though the tangs issue might put an end to that though.
Is the flywheel a part known to fail / wear?
I'd never really thought of changing it on previous cars, with the exception of fitting a lighter weight one...