GOd, that sounds serious, hope all heals quickly.
Do you remember much about the car or its occupants, do you have anything you can take to the Police, that is pretty serious stuff, two months off work.
I know you went after them and damaged the car but if they had not provoked you they wouldnt have lost the mirror and wouldnt have had to get out and dispense their "justice".
I would, make it my business to get them back one way or another if there was the slightest chance of locating them.