I need replacement plastic on each end of my window, due to weather these parts are destroyed.

Thanks for reaching out! There is a chance we have a replacement solution for both the sweep lock and the window tilt latches, however I'll need to see a photo of the the top of them to confirm. I'll need to see their design to determine if we have a replacement or if there is any other information I might need.

Let me know if you have any questions.

Thanks for the photos. Its still a bit difficult to see the shape and design of the parts because the photos of are a side profile view, however, it looks like you may have the 26-078 and the 26-079 . Look over the dimensions and compare them to your existing tilt latches to determine if these might be the right fit for your window.

Alternate image for 26-078