Those are 40' reefers like Whitepass observed. I looked around quickly at the DLS. Found this one that is very close to your 2nd example: kuid 7592 2010146 D&RGW 40' Boxcar
Its not the exact one, looks a bit older and low res but might work out! Could be from one of the pay sites where they have packages of various freight cars...that would be a long search!