Edit or recreate a Photo

I have photo of a set of stained glass windows. I need the backround and multiple elements removed from the photo. The goal is to print just the window itself on a clear transparency sheet. This is to be used in a small 3D model. The photo is also a little distorted and not perfectly rectangular due to perspective of the camera. Try to square it off so it looks correctly proportional. See attached images and notes. 1. Remove all the dark border around these windows and make transparent 2. make transparent all the blue sky and all image you can see through the window. All that should remain is the crosshatching and the colorful emblems. Everything else should be transparent.