I don't "do" model railway... but I just finished this for a friend and his club layout.
Started out with 50mm pvc pipe, cardboard, and some styrene stick and sheet stock.
Three bins were modified to make two, and the "elevators" were Walther kits extended for height.
Not entirely accurate, but time and cost was a consideration. 45 hours of work here.
We'll see if they want the rest of the building and the dock side conveyors modeled.
I am hoping to get a picture of it on the layout once it's installed.
I'll post a one of the photos I had to work with.
Aimee