Hi Brian -- These were a stock PRS part, and as such are probably available from Des Plaines Hobbies. You should check there... I bought a bunch when it was owned by John Verser and Jerry Porter, and they are the standard roof on my 10’0” IH 40’ boxcars with a 6’ door.
Bill Winans I'd like to model some Erie boxcars from the 60's, and most of their AAR boxcars had Viking roofs. The N&W historical Society at one time offered an N&W boxcar that came with a Viking roof from PRS. Would anyone have one, the car or the roof, for sale? I know it's a long shot, but would save a lot of work scratchbuilding one or having one drawn up in 3D. Thanks Brian