Miller Motorcars in Greenwich, CT, had one about 6 months ago. Not on their web site now, but might be worth calling them.
they will all be under 5k miles because nobody drives them....they are ridiculously difficult to manage anywhere but the highway.
If you don't mind importing from the AEU AlAin Class motors has a new 0km 2008 Alain Class Motors Offcial Website | MASERATI MC12 - Limited Edition no affiliation
I know you were joking, but there are a few cars with more miles. One that was on the market recently with slightly more miles. There's also another heavily modified car that probably has 50-60k miles on it by now! Edit - sorry for the OT. This doesn't help John find a car
Yeah lake forest sports cars has one but it is the Corsa version for track use only...currently up for $2.5m