Are ATX case side panels standardized or is there a more common dimension? I have two ATX cases and they might be the same size. Anyway, the reason that I am asking is because I want to swap my current case's side panels for side panels that are better ventilated. I want a side panel with a lot of vents or mesh for better air circulation so that I can replace my current CPU fan with something much quieter. Is there a place that sells side panels? I realize that the screw holes might be different, but I can drill new screw holes if needed. I know that I could just buy a new case, but I am happy with my case and current setup. I just want better-ventilated side panels. I though about just removing one side panel, but I want to protect the inside of my PC (I have a curious cat).