Cant' find or know what it is called "Window Screen Holder "T" Insert"

I need help....
So I can't seem to find what brand of windows I have and several of my windows have the little clip thing that holds the window screen flush with the window frame missing. I have searched online and can not find anything remotely similar to what I have. Does anyone have this kind of screen holder or know where I can get more (the holder is the yellowish "T" shaped plastic that is inserted in actual window frame.


Thank you for your knowledge,

Gimme =o)

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Cant' find or know what it is called "Window Screen Holder "T" Insert"