i've uploaded a hp2xx binary and extensive documentation (manpage, info,
and dvi format) to tsx-11.mit.edu, pub/linux/packages/TeX/hp2xx.taz
The `hp2xx' program is a versatile tool to convert vector-oriented
graphics data given in Hewlett-Packard's HP-GL plotter language into a
variety of popular both vector- and raster-oriented graphics formats.
The various supported output formats include Encapsulated PostScript
(EPS), MetaFont, PCX, IMG, and several formats intended to facilitate the
generation of graphics within TeX documents. In addition, `hp2xx'
output is printable on the HP Laserjet/Deskjet printer series, and it
may be used as a HP-GL previewer on many platforms, e.g. X11