What need to happen is the geometry of the damaged planes has to be captured as soon as possible (laser scanning, high res photogrammetry.. ) recorded in as much detail as possible using fiducial targets of known size, that would be of assistance in getting the measurements right.
Using laser scanning and photogrammetry. It may be possible to
recreate the plans for these planes using math.
Thats how the Saturn 5 (Rocketdyne F1) engines were re-created. The designers are free, they need to get out and into safety.
This is what they rebuilt,
https://en.wikipedia.org/wiki/Rocketdyne_F-1 Safe and sound.. They need to get themselves into safety.. They should fly out, to one of the Baltic countries.
The Russians made a huge mistake..
The designers have a huge job ahead of them, but its hardly impossible.
It could be an inspiration to all of us, this story.
Looking at the damage to other planes there I can't imagine many of them flying again. The bullet holes ripping through fuselage, hydraulics, avionics, etc. will be extremely expensive to repair, especially given the aircraft are mostly outside of series production. The An-225 is more of an exception, hearing the chief pilot tear up over that was hard. I don't think much more than the tail section and some engines are usable, and even then those will need complete overhauls to ensure they are airworthy. That aircraft is gone, sadly, but maybe the parts can be used.
A Boeing 777-200ER was fire damaged due to an uncontained engine failure a few years ago. That one was repaired, but the repair process took a few months and the cost was close to writing the aircraft off, though it wasn't quite there:
https://en.wikipedia.org/wiki/British_Airways_Flight_2276
Just that small fire damage on the aircraft in the hangar may be enough to write that off.
Most insurance doesn't cover war, I expect aviation insurance is the same. So repairs/replacement will only happen at the cost of the Russian state, or if Antonov funds them privately.
They dont have to fly again, they can be rebuilt from the geometry if its important.. They will need the CAD files to do anything modern anyway. They need to laser scan and take sharp protography lots of images to recreate the aircraft.. Hellthis isthe 21st century. These men are all professionals and the best at what they do in the world.. Teamwork.. is the key. To making things fly..
Your attitude determines your altitude.. Nothing else.. Yes, that was a US propaganda slogan.
Colmap can be super useful.. And easy to use..Colmap.
https://colmap.github.io/