Hit a bump on the road yesterday and my glove box door opened, the lock cylinder, case, and the threaded escutcheon fell to the floor in 3 pieces.

When putting it back together, all pieces fit just fine. I can insert the key fully, but can’t turn it to lock or unlock.

Is there anything I can do to repair this, or am I looking at a replacement?

 

It looks like you lost a tumbler in that lock, the second one down in the first photo. Also, when you reassembled it, did you hold the silver tumbler in with your finger before inserting the key? If not, the lock cylinder probably isn't fully inserted. That's a special retainer tumbler that is released the first time you remove the key to hold the cylinder in place.