That would depend on the structural damage. The worst case is that the undamaged components get stripped out and installed in a later new-build centre car and the structure/body gets replaced by the insurer.
Unless some of underfloor components are damaged, which is entirely possible.
However, given these new railcars are designed to the latest crash specifications, I can't see falling off the back of a low truck at moving at 60km/hr or less to cause too much major damage. Even a few bent panels or broken windows would be enough to send it back for checks and repairs.
If Bombardier are really desperate there is always 4001T they could use, got to be less work than making an entirely new car.