Oldsmobile F-85 1961 back glass rubber

Hi

I have a Oldsmobile f-85 1961 4 doors. Since 1 year I search for a back glass rubber for the car.

I bought one from SteeleRubber, but it's does't fit.

http://www.steelerubber.com/search?year=1961&make=oldsmobile&model=f-85&style=4-door-sedan&s=pricedesc#rear-window-gasket-50-0451-81

I already contact RubberTheRightWay (SteeleRubber product), Metro Moulded Parts and Soffseal. No one have this rubber.

My car it's almost ready to go back on road and I need this rubber.

Can someone have a idea where I can find one?

It's the same rubber for a Oldsmobile f-85 4 doors 1961-1963 and Buick special 4 doors 1961-1963.

Thank you for your help!