How to purchase a Wilson Tweeters

They probably need to be bought from Wilson. Even tho they probably were OEM, Wison either modded them or had it done by the OEM. Trying to find them elsewhere will be like looking for a needle in a haystock.

Look to Zalytron, Madisound, and Meniscus for the drivers, one of them carries Focals.

Thanks Porziob, Loontoon.
Loonton, do you mean Wilson use Focal speakers?
Han

Loontoon meant that Wilson sources the tweeter for this speaker from Focal. However, as Porziob pointed out, Wilson modifies the driver in house to their own specifications. Just taking an off the shelf Focal tweeter may prove to be a bad match. Best to contact or Wilson or an authorized Wilson dealer.

I mean that Wilson sources his tweets from Focal. They are rumoured to be modified, but it's still a Focal T(x) 120 series.