used (or new) windows with screens (Mount Kisco)

Looking for windows to close in our old, fully screened porch. White frames preferable. Many windows needed, but all around 34 - 36" high each for lower and upper portions, or can use 1 really tall window to combine the 2 parts. Ranging from 12.75 to 44-4" to 51-52" wide. We can add framing to fill in gaps.