Request for Sites for Freely-Licensed Sample Files (PCLm, PWG, Apple Raster)

Hi everyone,
I’m currently adding test cases for pdftopdf and need freely-licensed
example files in the following formats:
PCLm, PWG Raster, And Apple Raster(URF)

If anyone knows of a reliable site or repository where I can find
sample files in these formats, I’d really appreciate the help.

Thank you,
Uddhav Phatak