Help, I broke my broom...

[DavidJayUden]

Shooting the C96 red 9 broom (mismatched, reblued, etc.) a bit yesterday and noticed a part on the bench that hadn't been there before. Turns out to be the release button that frees the rear sight adjuster block so that it can slide fore and aft, raising and lowering the rear sight. I have no idea the correct term, so I'll call it the rear sight release button.
Anyway, I need a new one and also a quick tutorial on installation.
Thanks for you advise, support, leads, etc.

dju