https://web.archive.org/web/20260102013832/https://carnegiee...
https://www.clingendael.org/publication/assessing-strength-a...
https://www.themoscowtimes.com/2025/08/01/russia-limits-acce...
https://www.themoscowtimes.com/2025/07/07/rosstat-stops-publ...
Production in 2024 was estimated at 310–330 tons, with significant output from Siberian and Far Eastern regions like Krasnoyarsk Krai and Magadan Oblast.
So in a couple of years or so that amount of ~395 tons sold off can be replaced.