Crestline Window Parts

My wind out Crestline window will not stay closed (IMG 1802). The plastic pieces holding the sliding metal track have deteriorated (due to the sun and age). I need two different parts. One is the part (IMG 1803) to hold the sliding metal rail that goes up and down when you try to secure the window. The other is the part (IMG 1805) that catches the metal rail and hold the window secure. Does this give you enough info or do you need more photos.

I'd like 5 of the 1803 parts and 5 of the 1805 parts.

Thanks.