According to a TASS news story, Lyubomyr Sabadosh, head of Ukraine's State Space Agency of Ukraine (SSAU), recently stated:
We have proposes using our capabilities for implementing a joint design solution for the production of a liquid propellant engine, which is currently purchased in the Russian Federation. Our partners have an understanding that it's quite a complicated task, but we can cope with it, and the discussion will take place at the level of professional experts."
While the US has plans to build its own rocket engine, a deal with Ukraine gives us more breathing room while also helping a partner in the region looking for some help. One can only hope US officials give this proposal serious consideration.