4 door front drivers window glass holder

I was winding my window up the other day and it jammed halfway.
Managed to encourage it all the way up and drove the car home.
On dismantling the door it appeared the metal bracket that holds the glass at the bottom has almost completely rotted away. The winding mech is fine.

Are these available? it's certainly beyond repair, easily replaced if only I can find another. Has anyone ever made one?