@User: Interestingly, there is an nwell resistor model, and we all completely missed it, because its name has not been converted to the new syntax. It can be found in the models (not cells; it's just a simple resistor model and not a subcircuit) as ".model mrnw". I am unhappy with that and also the high-voltage n- and p-diffusion resistors, because the simple resistor model does not take into account the diode between the device and the substrate or well underneath. Consequently, you could forward bias any of these devices and it would not show up in simulation.