I think from the initial inquiry posted by O-Gauge CJ, he's not overly picky & is looking for a credible scale hopper that will look at home being pulled by his newly acquired "N&W 4-8-2 K3", even if it only pulled passenger cars. It seems the major 3 rail manufacturers have overlooked the exact prototype for more than one item of rolling stock for the N&W. I think a proper affordable 3 rail caboose is a more significant omission, for what ever the reason, if you ask me. Only expensive brass imports have been available for the Norfolk & Western CF, CG, C2 & CH caboose, except for the Quality Craft CF kit, that I am aware of..
If not overly picky, then perhaps looking about for some of the older Rail Craft (Train Craft) peaked end 2 bay hoppers would be acceptable? Painted and decaled they look decent enough when applying the 3' rule.