Peachtree Window Screen Pin

I am looking for Peachtree Window screen pins. The metal part is smooth and goes through a hole in the screen and fits into the vinyl window channel. It has a white cap as shown in the picture that seems to have a springing action to pull them to get the pin out of the channel to remove the screen. I can't take one out to do a full picture because the plastic caps are so dry rotted they break if I try to use them. I would like to by at least a dozen of a pin that will work.