Cool thanks and good luck.
Parafilm tape (spelling )They make some stuff to repair trees like that. Seems like it's some type of "tape" natural thing to repair wounds. Several big apple farms and things use them. But I can not think of what ifs called.
At the very least. I would put a tree tube around it attached to a tpost cage does best. But I've found out they don't like the tpost being there.