Injured squirrel

My mom is having a tree removed and in the process a baby squirrel jumped from a high branch and hit the ground. He seems to have a broken leg. The tree removal people brought him to us and said they didn't see his nest or family. I called Second Chance but the voice recording says they are not taking new animals. I'm in the Middletown/Saint Matthews area.

He is old enough to have open eyes and full fur, and it's been about 2 hours since the fall and he is still conscious and alert.