Any thoughts on replacing the wind out front window with a fixed window.

I'm reluctant to attempt to do the job myself, but over the wet season during heavy rain Im not sure if the water was leaking in around the window frame or the wind out portion was not sealing properly.

I'm leaning toward having a new window made with a heavily tinted and reflective polycarbinate with a new aluiminum frame. I suppose that I need a specialist manufacture because of the rounded bottom courners