old 1964 evirude Lark 3 gasket

[ycoupeau]

Hello, I'm Yann, I'm French.
I rebuild a old 1964 evinrude lark 3. In the carburator, the high speed nozzle have a small gasket. (number 78 on the figure in PJ). Someone know the sizes of this gasket and the material used. In france this part is not available. Thanks for your help.
Excuse me for my english language.
Best regard.
Yann
1968 40872A Evinrude / Johnson Evinrude CARBURETOR GROUP ELECTRIC SHIFT Diagram and Parts

[boats.net]

Unfortunately the oldest my resources go is 1968.