The Poles could cooperate with the Romanians. Possibly also with the Hungarians, Czechs, a few others, to pool resources and get it done quicker. Thought they’d have to share. Which might have a set of advantages in survival of a distributed arsenal.

But Joseph Somsel, I think the Poles could cut the time to 3 years at least, if they poured every resource into the effort. They still have a lot of technical people, and they could buy assistance from North Korea and possibly China (discreetly of course).