SPICE model for a computer bus / data bus
For starters there are digital components in LT spice:

To simulate the RLC effects on a digital trace, I would use saturn PCB designer calculator.
https://saturnpcb.com/pcb_toolkit/
There are calculators to find the inductance and resistance and capacitance for traces. I won't go in to great depth on how to use it, but I select a copper trace and then find the capacitance and inductance per inch. I then estimate how long my trace will be and then find out my total capacitance or inductance, then build an RLC circuit.
For high speed traces (usually meaning over 50Mhz, where transmission line effects happen) there are lossless transmission line models and lossy transmission line models in LT spice.

Source: https://iexploresiliconvalley.com/2019/08/27/ltspice-lesson-3-transmission-lines-part-1/