I need a bolt ..

Can anyone help with my 67 Bus.  I need a replacement bolt for where the
swing plate [I think that is what it is called] connects to the RGBox.
There are 4 bolts, 3 on one side and a single bolt on the other.  The head
of the single bolt broke off.  Need to take it "somewhere" and pay
too-much-money to get it removed, but I need a replacement bolt.  Can anyone
help ??

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               ¸.·´  .·´¨¨))
        Diane Vee
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            -:¦:-  ((¸¸
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