I don't like to be the 1 that says this, but being realistic and fair to you, the O Scale market is small compared to HO&N Scales. The chances of Atlas doing the car you asked about is very small. I, and others, want a 2 bay hopper,I think the capacity is 3281,like the Atlas 3bay Trinity hopper as well as a centerbeam lumber car. But the chances of either of these being produced is extremely small,at least in my mind. Getting Atlas to run new roadnames for existing models is like pulling teeth.
To some up,weigh what you aren't&probably won't have in O Scale vs. what is available and imporant to you in HO carefully,before making the scale change. Just my opinion for what it's worth. I been in O Scale for 4 years now and am likely going to have to leave because of what's looking like a change of housing.
Alan Hummel