MOSFET simulation model missing: what is the best practice?

Schematic Simulation (Ngspice)
1

I’d like to simulate a circuit that uses these MOSFETs:

Infineon has lots of simulation models available for download, but not for this specific product.
Now, I could search for a model of a similarly specced MOSFET, but I’m also wondering: does it make any sense to try to “customize” one of the existing models with data from the datasheet?
In fact, when in the schematics I add a “Simulation_SPICE/PMOS” symbol, by clicking on Properties/Simulation Model… I’m presented with a dialog intended for doing just that. A guide on the various “base model” is available from ngspice’s documentation here: Ngspice User's ManualVersion 44plus(ngspice development version).
Yet I’ve not found any specific guide on how to move from there. Actually I found some forum message suggestion to avoid this route. It seems like this is a path intended mostly for “product developers” rather then “final users”.
Your experience?

2

  1. Ask Infineon for a model.

  2. Search for a model of another transistor with similar data

  3. Customize a model: This requires your understanding of the device working principles and of the role of individual model parameters, and then simulating the device and comparing simulation results with datasheet values and graphs, while changing relevant parameters.

  4. Customize a model by comparing transistor measurements (typically by a curve tracer) on a lot of devices with simulated results,while changing and optimizing relevant parameters.

3
  1. If you need to simulate buy parts form companies that have models. (This incentivizes them to give them out, along with asking)