a technology transfer is only slightly lower risk than restarting production on an old design. You have about half of the issues - because I can all but guarantee - no matter how good the polish missile is, and no matter how modern their production methodology is, we're gonna probably need to build it differently here than it would be built in Poland.

A good example is when the US started making Merlin Engines during WWII, it amounted to a near redesign.