A lot of windows on my sun porch are missing parts of the latch. I am guessing that time and cold has led to the plastic latch mechanism breaking. Some of the windows are missing both latches resulting in the top window sliding down over time and leaving a gap at the top of the top window (think: flies, wasps, and the like).
What is the component called that I need to replace in these windows, and where would I find it? Note: No idea of window make/model. See pictures below.
Here is a picture of a window with the proper latch and "hook"
Here is a window where the part that is hooked into is missing
Here is the latch detail.