I think the package is ps-print.el (I'm from a remote terminal right now, so I can't check thoroughly), and it says it belongs to GNU Emacs, so I would assume it is present there too. When I read the file I assumed it would only work from interactive mode because it says it needs a font-lock package. But if you figure out how to make it work from batch mode, please let me know :-)

--ZZamboni