anchor Pins

I just missed it on your website, but where would I find top fixed anchor pins for my old peachtree window screens as well as how to replace them since many have broken off? All I can find are plunger pins.
The screens have 2 fix anchor pins at the top, and on each bottom side is a plastic latch. If the top fixed anchors can't be replaced, can I install the plastic latches at the top as well?