Just a short video of my unit grain train. Five locomotives total, 4 Athearn Genesis (2- SD70's, and 2- SD70M- 2's), and one Atlas Dash 8, thrown in for good measure.
Hi Deborah, most of the cylindrical covered hoppers are manufactured by Intermountain, though a similar car is produced by North American Railcar Corporation as well. The Intermountain cars are likely still available through some online dealers/shops, and eBay, which likely has both new and used cars available. -Phillip