Needed Window Latch

I need a latch just like in the photo. I think the dimensions are the following:
2 x 1 x 5/16 or there abouts.
The latch is needed for a set of older windows. I bought latches from from Amazon that were similar but not exact copies of the latc, but they did not work. Lowes and Home Depot only had latches like the ones I purchased from Amazon. That's why I need latches more inline with the photo if they still exist.