Crap! My tailight fell off

Got home Friday night and the passenger side tailight housing half that is attached to the tailgate ( or is supposed to be ) was gone. It had been sort of loose for a year or so I guess. I must have hit the speed bumps too fast on the way home.

Anyone have or know of one I can get to replace it? I just do not want to give the cops another reason to pull me over, I am not looking for show quality or anything like that.

65 Dart wagon
Thanks
I will be at wildcat tomarrow, i will see if he has one. if so i will get it.