Tilt Latches Needed.

Hello, I have tilt windows with many of the latches that are broken and need replacement. I think they are internal? I'm not able to identify which ones to order. I believe the measurements are: 
width: 11/16"length: 2 11/16"Those are the exact measurements from my ruler, but maybe there are more common "3/4" and 2 3/4"? Images: The removed one is broken. The one in place in the window is in tact. Thank you, Joy