Morph Loader Pro is not sold as a separate plugin for DAZ Studio.  It is only sold as part of the Advanced Figure setup tools bundle for DAZ studio.

The plugins for DS do not work in Poser as Poser uses Python scripting and DS uses QT scrpting.  DAZ kicked around the idea of Python scripting for DS but decided against it before the beta release.

DAZ sells Morph Loader but it lacks feature the pro version has.

With the prending release of DS 4 Advanced and 4 Pro, the setup tools will be replaced with what DAZ is calling the Content Creation Tools.  No date for release or price has been mentioned to date.

The current figure set up tools work in DS3 but not in DS4 and will not be updated for 4.