Rapido does indeed release some road specific details for their locomotives. Unfortunately, many of the details are incorrect. The current SP&S FA-2 has at least 9 points of failure on that matter.
Athearn has been pretty good about accurate detailing, lately. I bought a BNSF diesel that was properly detailed for an era a few years ahead of the one I wanted. I will now modify it to the era of my choice. And. It was remarkably affordable.
These new models, while generic and consequently somewhat overpriced, will still be welcome.