Anyone know if the 2 steel washers in this drawing are available anywhere?

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My truck is a 1950 1/2 ton.
I have a leak at that retainer. I have a seal kit to repair but suspect I’m missing the 2 steel washers. I would like to have 2 on hand before I tear it down.

If they are not available from the vendors if someone who has one torn apart can give me the dimensions I’ll get 2 fabbed up.

Thank you