Helium-4 is what you get out of the ground with natural gas. Helium-3 is what you get from tritium. A combination of these two is what gives you really low cryogenic temperatures needed for quantum computing.

Canada produces a lot of He-4 from natural gas and a huge proportion of the worlds tritium in its heavy water reactors. Most countries that produce tritium and He-3 tend to hoard it, but Canada is selling it cheap. If the U.S. wants to be forward looking, they should talk to Canada about a long-term tritium and helium supply contract.

Edit: Of course, I would imagine it would be in the interest of other countries to do the same while Canada is placing a premium on non-U.S. partnerships.