To be clear, mine are Spoon S2000 aero mirrors with custom fabricated bases; I'm not sure why my car made this thread, and I was going to let it slide, but it seems a little misleading.
Personally, I've never heard of this mirror being made by Spoon for the NSX, in fact, when I contacted them nearly a year ago they said outright that it was never made in an NSX application - not discontinued, but never produced.
The first evidence to the contrary are the damaged NSX-RGT pics posted at the end of the last page, which appear to show a slightly different shape of mirror base than the one made for the Civic / S2000. It's possible this was a 1-off set, since the car belongs to the owner of Spoon, and was a bit of a play thing - in other outings it sports factory NSX mirrors.
In any case, my understanding of the thread is that arrangements are being made with Spoon to produce a new product, which should fit the NSX directly. Personally, I'd like some kind of confirmation from Spoon that this is the situation, since there are several companies producing poor quality replicas of this mirror.
If Spoon is willing to go out of their way to make an NSX product again, after their brief RGT foray a few years ago, we should seize on that as a community.