The mag wheel which I can purchase with a new article in present Japan is only "MAGTAN".
This "MAGTAN" is a product of "BITO R&D" leading Jo Bito.
It is the highest quality which MotoGP accepts, and this wheel has high popularity of the vintage motorcycle owner.
And the supply is stable too, and is reliable.
Speaking of Jo Bito, he passes through a mechanic of Yoshimura and he is famous as the tuner which spent American Honda with Mike Velasco, but am known as an industrialist in Japan.
Japanese News Site
MAGTAN of the new article is better than a used Campagnolo.