They are very capable of making any of the equipment they don't already have - and you would be very surprised how much of their current equipment could be "repurposed" overnight. 

I once asked the question of some Americans who had reason to know. They said "Two weeks - tops" - but that was working flat out.

Why would there be sanctions? A US ally taking on their "fair share" of defence costs, just as Trump demanded - who could object? Other than China, and North Korea of course, which would make The Donald even happier.