Atlas also do a PS 2003cft in HO.
It is now part of their Trainman series but is unchanged from the original release some years ago in the red and black boxes.
When Athearn upgraded the ex-MDC PS2003 they didn’t do anything with the rather heavy end cages.
If you have some old MDC 2003s the end cages from Athearns PS2893 3 bay would be a neat upgrade.
However if doing an undec kit, by the time you buy the end cages from Athearn and add an etched roofwalk, plus paint, decals, metal wheels and couplers, the Kadee car can be a “not much more expensive” alternative, and THEY are superb.