driver's door vent window frame and assembly

[mjkern@xxxx]

Hello!
I need to replace if I can not repair the driver's door vent
window frame and assembly on my 300C. The junction of the straight part
of the vent frame which also serves as the window channel has separated
from the grooved upper portion of the frame. Things are nice and rigid
with the side window fully raised but are rather loose when the window is
lowered and quite a cacaphony of sound is raised when the door is shut
with the side window down. Help! Can someone lend advise for repair or
does anyone have a driver's door vent window frame and assembly for sale?
Rob Kern