Missing window part with locking device
Thanks for posting. It appears you are searching for the keep for your sweep lock. I believe our 90-177 would be the correct replacement. Take a look at the dimensions below to confirm that is will be a fit for you.
Thanks for confirming. It appears you are speaking about the glazing bead from the window. This snaps into the channel of the window and helps to support the glass in the frame. I recommend starting with taking a look at our section of glazing bead, here. Take a look at our selection and see if one of these may work for you.
If you need assistance with selecting the correct glazing bead, I'll need to see a photo of an end profile view, removed from the window.