If you've got the other car to take measurements points from and possibly build a jig to the suspension mounts and some chassis locator holes then transfer to the smashed car, as you'd want to save it I'd be contacting a few crash yards that can pull it back in line. Personally I'd attempt the save as it's probably cheaper and quicker than getting the other shell ready . Either way you go with it will be an interesting journey

Sorry to hear this mate! Hopefully you can get her back on the road. Cheers Matt

Really sorry to read about this, hope you find the time and energy to right it, I know myself, at this point in my life it'd be difficult to do.
Quite poignant for me really, lately spirited driving has been turning into hard driving. I'll definitely take something from this and start backing out of it a little earlier.
 
Good luck with it 👍