WTB: WRA WIN-13 Gas Cylinder Screws

[SPEEDGUNNER]

I am looking for 1 or 2 gas cylinder lock screws that would be correct for a late WWII Winchester M-1 Garand rifle (WIN-13). These screws will be similarly marked to other poppet style screws with the exception they will have a punch mark, indicating Winchester.

Thanks.

[CPC]

I know it is not very much help, but I believe you only need a PO marked valve without punch.