1990 3600 Open Windshield frame

[67-LS1]

I’m looking at redoing the windshield frame on my 3600 Open. There is some mild surface corrosion in a few spots on the inside where it looks black anodized. The outside where it’s painted white is still pretty darn good for 30 years old.
I asked Tiara about where I might find some replacement extrusions and they drew a blank. To far back.
So if anyone has any ideas as to where I could source some windshield frame parts? 
New or used???