M14 - looking for a part number

[Kokanee]

If I may, I would like to impose on any fellow members of the M14 brotherhood whom may be able to assist;

This part in my M14 has worn;



(area of wear circled)

It's the lever that controls semi/auto on the left side of the gearbox underneath the little "armour plate".

Unfortunately, like the stereotypical male I am, I did not retain my manual., and I have been unable to locate a copy of the technical service manual. If someone would be able to look up the part number I would be much obliged.