GM Vent windows of the late 30's

[rooster]

I have a broken vent window part from a 37 chevy, its made of pot metal, its a common broken part from over tighten vent window. I have not found anyone who reproduces this part as of yet. I was thinking that maybe this can be repaired by sleaving ( copper pipe) the broken area , filling the void where the broken part is missing with JB weld then redrilling where the bolt holds the two pieces together. any ideas?

[Stakebed]

Which side do you need it for? I have a pass side door for a 38 sedan. Am I right that you are looking for the lower piece in the picture? If you are interested I could check its condition. I'll be at a run this weekend, but let me know if this might help.