What was unique about GWM is that they modeled the earlier version of concrete panel "tilt-up" construction method.
The wall sections were cast at a plant, or sometimes on site, and then stood in place with heavy cranes.
One wall panel would consist of 2 of the vertical ribs, along with 1/2 the span of the flat wall section, on either side.
Today, it's the most popular way to erect an industrial or warehouse type building.
I guess I'd start with Walthers, and see what they had to offer. All tilt-up does not have the ribs, many designs are flat panels, or flat panels with decorative relief sections for accents, usually painted with an accent color.
I'm not sure if Walthers offers a tilt-up type design or not, you'll have to check it out.
I always like the look of GWM's. Maybe you can find some on Ebay.
Good luck,
Mike.
My You Tube
Great West Models is long gone. I enojoyed their kits to Kitbash them. Maybe try buying sheets of styrene and then adding strips to make that look? Next best thing. If you're doing the layout more towards the track work than buildings, then kitbash any type of building. Look at it from another angle. The buidling caught fire, burned down, and the owners rebuilt a new one. Now you can add a building that in your mind will suffice. It's your railroad!
Neal
I am thinking about building Lance Mindheim‘s small swit layout the palmetto Spur but one of the main buildings is no longer available. Allied chemical (part #501) from Great West models. It’s a unique buildin. Any suggestions on a substitute?