Door glass lower stop

[Stephenorf]

My driver's side door glass fell into the door. Upon disassembly, I noticed this rusty bracket and removed them. At first I thought it was two brackets. But looking at the exploded diagram, it looks like they are both from the same bracket (21578). I cannot find a new or used one anywhere. So it looks like I'll need to fabricate my own.

I think this broken/missing bracket is why the glass crashed all the way to the bottom of the door. Now my driver's side door glass is all busted up and cracked.