It is also important to note that Kazakhstan still has the world largest Uranium production, by far. Almost half of the world production comes from there. https://en.wikipedia.org/wiki/List_of_countries_by_uranium_p...
Super-enriched Uranium, however _is_ super rare, expensive and desirable.
The enrichment to weapon-grade U235 is trivial, you just need enough good gas centrifuges or a reactor.