Could you not use Objaction to distribute a .pcf, then point the Poser users toward the original object to download? It add an extra step, but it should work, as long as the meshes remain available. Or would conversion from .3ds to .obj not be consistent enough from user to user for this to work?

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Cage can be an opinionated jerk who posts without thinking.  He apologizes for this.  He's honestly not trying to be a turkeyhead.

Cage had some freebies, compatible with Poser 11 and below.  His Python scripts were saved at archive.org, along with the rest of the Morphography site, where they were hosted.