Searching for Peachtree windows replacement screen material and spline with tool

I'm I don't know what hardware you need. In order to make a recommendation, I will need clear and unobstructed photos of each part you want to replace. In the case of the spline, I will specifically need to see the end profile and I will need precise dimensions. Please let me know if that would be possible.

Last thing to keep in mind: Peachtree windows haven't been made in a long time and most of their products are completely and totally obsolete. There is a good chance we can't help you with this project. I just wanted to let you know that now so that I don't get your hopes up.