Jordan Holmes wrote: is there a way to clone the clipped ends? I’d just really love to save these trees. Same goes for the roots still in the ground — will they still try to grow?
In my experience hazels don't root well from cuttings. They are usually propagated be seed, or clones by layering - burying the stool so that each twig reroots whilst still being attached to the original root system. A bit like apples, the cuttings just don't seem to take.
The portion in the ground ought to be OK though, although as previous posters have said they may well come back multistemmed.