Two additions in the resin market have made this class (and other minor variants)
easy to model. The first is Pacific Mountain Scale Shops (PMSS). This kit came out around
2003 or so, but is no longer being made. The neat
thing about all the versions PMSS offered was
that one was a Chessie era specific variant with retention
toilet tank, etc.
These all came in kit form, unpainted, but did
come with decals included.
The most recent addition is the Spring Mills Depot kit. Both of these are relatively expensive offerings around $40-60 each. The Spring Mills Depot ones are more expensive but come ready to run. Spring Mills offers B&O blue and Chessie B&O paint schemes.
Below is a Dean Heacock pic of one.