Tilt Latch Assembly

I have a Certainteed widow, about 20 years old that needs new tilt latch assemblies on right and left side. I cannot seem to find replacements and wonder if they still exist. I have included photos of the latches although not complete due to being broken. Can you offer some help? The latch in the photos is about 2 3/4" long and 5/8" wide. Thank you. Tom L.