PostScript (ps) to Encapsulated PostScript (eps) Filter

[ABoeckmann]

Does anyone know of a third party or public domain program that can take a
postscript file (e.g., PostScript.out from Splus) and turn it into an
Encapsulated PostScript (EPS) file?  The idea is to import it into
SunWrite in such a way that it can be seen as-is rather than as a black
box.  (This is needed for a Sun3/50 running SunOS3.5, or for a Sun4/330
running SunOS4.0.3.)