Considering where it comes from and how its produced I'd say we should be OK if we are willing to use what we have.
From Google.
The US holds the second-largest yttrium reserves globally, estimated at 120,000 metric tons, following China's 220,000 metric tons.
Here's a more detailed breakdown:
Global Reserves:
China holds the largest yttrium reserves, estimated at 220,000 metric tons.
US Reserves:
The United States has the second-largest yttrium reserves, estimated at 120,000 metric tons.
Other Countries:
https://en.wikipedia.org/wiki/Yttrium#:~:text=Yttrium%20is%20a%20chemical%20element,%22rare%2Dearth%20element%22.
Annual world production of yttrium oxide had reached 600 tonnes (660 short tons) by 2001; by 2014 it had increased to 6,400 tonnes (7,000 short tons).[51][67] Global reserves of yttrium oxide were estimated in 2014 to be more than 450,000 tonnes (500,000 short tons). The leading countries for these reserves included Australia, Brazil, China, India, and the United States.[67]
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