Better-Bilt Window Latch

My home was built in 1992 with Better-Bilt Series 560 windows. To date all windows are still as clear as on day 1. However the latches are becoming brittle and a couple have broken so I am looking for replacements. They are top mount without screws, fit on the upper corners and lock the sash in place to raise and lower. The window locks are along the bottom of the sash. The latches have lips that go over the front and back of the frame as well as having tabs that sink into grooves on top of the frame. I am sending photos of a broken latch the top edge of the window where the latch fits as well as paperwork with diagrams when the windows were purchased. I am hoping you can help me!