I propose these old "Fallen flag heritage hoppers" similar to the ones VRC made for the U30C i ve put 3 links up for trains that use these older hoppers
Actually theres the feather river canyon soldier summit cajon pass , sherman hill , race track route for loads & empties and in recent months in new york too.
Union Pacific coal hoppers are included in the Sherman Hill package, but also in the EMD SD40-2 Independence Locomotive addon.
For those who are interested, 24ft ore hoppers are avialable here: http://www.golden-age-rails.com/packsrw/orehop.html