"their's" you mean Flight Globals?
If you have free time on your hands you can make a somewhat accurate estimate using serial numbers and online database/transfer information etc.
How viable would it be to get a non-US company to supply the engines off the shelf as a stopgap measure until Turkey sorts out the problem on their end?
Why are we training Bahrainis and Saudis? Arabs are terrible at modern warfare. Why are we training the Iraqis? They've supported India on Kashmir multiple times. Why are we training Sri Lanka? Last I checked they were still in the Indian camp. Why are we training the Zimbabweans? Not like they...
and how can anyone be certain of that if it hasn't seen any combat. The aim-9x was also supposed to have improved tracking and performance against countermeasures but got decoyed by cold war-era flares.