MTH makes replacement O scale 2 rail passenger trucks for this car with power pickup for lights.
It is simple to take out screw for 3 rail trucks and screw in the 2 rail set.
They have this for nearly all freight and passenger cars with an easy mount on most for Kadee couplers.
Lucky I already have a set and there has been many fine steam engines from Weaver and Sunset 3rd rail in CP that would look great pulling this set of cars.
Going to 2 rail my set if it gets made!