Metal nub on Window edge that fits into channel broke off.

Hi!

I have a window which is approximately 10 years old that was installed during a renovation back in 2012. I don't know the name of the manufacturer of the window. I was cleaning the window and when I went to reinstall the metal Piece that fits in the channel of the window Broke off. I just need the metal piece that holds two metal screws. Thank you for your help.