Guy on ebay sells titanium hardware - "Zakgear". Here is an example:
https://www.ebay.com/itm/29648709555...gAAOSwuOxmY3P7
He uses north American titanium.
Motorsports hardware is a great source and lists where it is made.
My favorite non-TI studs are MSI. But they are high!!
(BTW - I don't like chinese studs).