Hi Ron, I think GGD did some in the PRR undesired color once.
Actually IMW has everything for the LIRR fans, but they are all 2r including ARCH ROOF Ping Pongs.
Their shells require a lot of cost and time to convert and complete plus they are a bit rough unlike real OEM's.
Atlas cars will most likely look more like the HW MTH style.
I did modified one MTH MU by removing the head lamps and painting port holes. This is how the Atlas cars should look. The only thing I didn’t do was cut out all the end doors, add a brace across the door windows and change the number to a 1000 series.
MTH could do this as version as well to complement their RS diesels, but they don’t really care or know I guess. Sales would be worth doing them as converted MU trailer cars.
Oh, those L O N G MTH couplers....