Sauce for the goose... Europe et al should pause Arms Purchases from the US to help them build up their stockpile. Keep the cash local, develop similar technology and reduce the dependency on unreliable countries.

To import, all you have to do is write a check.

Vs. buying highly the complex manufactured goods locally, at scale, requires a high-functioning weapons industry. And even if you have the will and the skill to set that up - there's still quite a lead time.