I cannot get a clear picture of the schematic.
Is it a "roll pin" or solid?
Sometimes a roll pin could work. I would look at the local hardware store (not a home improvement store) and see if they have one. If it needs to be solid, they may be able to help with that, too.
Any pics you could provide?
"A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."
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Former President of the ECPT (Eifel Combat Pistol Team)