The safety lock for window I broke it. Need one.

This part is called a vent latch. The design of yours in particular is not immediately familiar to me, though. Would it be at all possible to see what it looks like out of the window? Note that it's usually not possible to remove these without damaging them, so keep that in mind. It may not be a guarantee that I can match it up even then, but it would be a big help. It's up to you.

In the meantime my first recommendation would be the 26-122. This seems to be the closest available in our inventory, but look it over and see what you think.