Agree but with a couple additions:
First, Do all you can FIRST to make your coach want to behave. Weigh and set tire
pressures. Maybe stiff sway bars. Even a "High Caster" alignment with at least 5*L and 5.5*R.
THEN, See what more you may need. Otherwise you could be trying to band-aid a compound fracture!
I think IMICH is referring to the collection of springs and yellow brackets out of Deming NM. You can leave or upgrade that OEM "Damper."
The self contained S-T-P and Roadmaster's RSSC (C for Class C, there's also RSSA) combine Damper and Centering. S-T-P is 140 Series for C's. Both require new bracket kits. RSS is less popular.
OEM is simply a Damper