should give you this choice for Alco handrail stanchions to which you
add your own wire handrails.
Smokey Valley RR Products, 108 Handrail Stanchions - Alco Road
Cal Scale or Kemtron used to make these in brass, but I don't see them
on Walther's web site and I don't have a current catalog.
Alternately you could try and get a set of Kato ones.
Check photos for the GN only ladders at the ends of the hoods (you're
on your own to make these) and add the number boards on the hoods as
well (Detail Associates or Details West make these, (use the short
"Freight goes great, when it goes Great Northern"