On Tue, May 12, 2020 at 01:53 PM, Allan Smith wrote:

Superior doors had different spacing for the panels.

I just realized we are talking 10' high doors to fit a 10'-6" I.H. boxcar. If that's the case, Accurail #124 might work.
http://accurail.com/accurail/Direct/124.jpg

Found at the middle of this page:
http://accurail.com/accurail/parts.htm

Dennis Storzek