I have more about this specific model in the January UMTRR. See the archive edition now on the website (link below).
While that paint scheme is unusual, having both B&O reporting marks and a CSX logo, it is legitimate and prototype photos do exist.
BTW I have been told that the car is sold out at Micro-Trains, although that usually means that it's not completely unavailable at train stores.
That car, by the way, is SMALL! It's not much larger than an N Scale truck (the one that goes under freight cars).