For the Atlas SD24 models with winterization hatches, replacement stainless steel screens are available. The first photo show the parts as packaged and the second photo shows a screen installed on a model.
If you are modeling a unit that had a walkway platform over the hatch screen (like the U.P.), we have that platform in our Kit #14773.
P/N 14772 SD24 Winterization Hatch Screens - Two(2) per package - Atlas model