My Toyota Carina was hit up the back end many years ago and the Insurance Company wrote it off.
The fella from the Insurance Company then said that it would be a shame to write the car off as it was in such good condition before the smack, so, would I be happy if they used 2nd hand parts instead of new to repair it.
I said that as long as it looked as good as it did then yes go ahead.
They did and it was an absolutely brilliant job at a third of the price.
Might be worth mentioning that idea to your Insurance Company and body shop people and see what they say.
Good Luck