Well, if it is ITAR controlled, all of it. And even if not, with the current regime…
Exactly. In this case, the engine apparently doesn't fall under ITAR. But, if DC decides to interfere anyway, they can.
There are people (both Canadian and European) demanding immediate and complete solutions for reversing decades of global industrial integration. It is probably better to think of the current situation as if it were a messy divorce.
Both sides will get emotional but, viewed one way, closest to a 'win' will be the one willing to walk away from that dysfunctional relationship with empty hands. (Letting the less-well-adjusted side think that they have 'won' will also reduce the number of testy tirades and tearful tantrums.)
Short version: There are no easy alternatives to US military tech at the moment. Even if you get around major components, as you say, there are still all those widgets that fall under ITAR. Before getting to a desirable outcome for former allies, this will be a long and often painful process.
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