Replacement clips for Hurd window screens - double hung, vinyl, monument series purchased in May 1999

I need to purchase Replacement clips for Hurd window screens - double hung, vinyl, monument series purchased in May 1999. Over the years, corrosion has built and several have broken when I try to take the screens out for cleaning. I have 22 windows with 4 clips each so I will need quite a few. The clip consists of a metal piece that has a spring in it. This attaches to a plastic piece that holds it in place. I submitted a picture of the clip in two pieces .
The Hurd window company suggested I contact you. Thanks!

Walt