You need some material to make a bracket. I really cannot help you there. I would head to the hardware store and look for some steel strap. The bracket shown above will work but I would prefer it if it was blank so I could drill my own hole.
After I have the bracket solved, I would bond the replacement on the backside with some JB Weld. I would drill my own hole, fill the hole in the play field with some wood dowel, install the guide and drill a new hole in the play field.