We need to replace several internal latches as the i.age above illustrates. It appears there is also a spring. The latch slides into the window when the handle is popped off.
Thanks
Bob from SWISCO responded:
April 6, 2021
I am afraid we don't have these exact internal tilt latches. This hardware is getting difficult to find replacements for. Instead, see if you could convert to surface mount tilt latches like our 26-228 and 26-229. The video below shows how.