Thanks!
Some of the ladder rungs at least is a ladder! We had a theory it was cut from a ladder (you can see the nipper marks in addition to the seam line), and Craig confirmed it's the Ladder Chief, 1/25th AMT. However, he also said not all the rungs are the same, so we're looking for other ladder bits as well. I have a Ladder Pumper and a Chief inbound for casting!