Quote - first of all, i don't think any of that content allows commercial use at all, let alone selling an edited copy.  second of all, what you'd need to do is change both the shape and the rigging.  there are several programs that either do this automatically, or help with it.  if you want someone else to do that, they would have to get the rights to do it and give it to you.  most people who can would rather just make their own clothes.  if you want to do it yourself you can use either Wardrobe Wizard (which comes with Poser 8), CrossDresser by EvilInnocence, or OBJ2CR2 by PhilC, and some form of morph tool (like the one in Poser 7 and up).  there are probably some other solutions, but those are the most common.

I'd be using Blender to make those items fit, and then import into Poser with Obj2Cr2... I'm imagining for personal use, the original mesh maker wouldn't have any issues. And that's the beauty of being able to have access to programmes like Blender: you can make pretty much anything you want work for Poser.

I even take garments designed for a figure into Blender to fix issues with the mesh.

I'm so grateful to the developers of Blender for providing such a powerful programme (for free, no less!) and to PhilC for making it easy to bring clothing into Poser in conforming format.

Monterey/Mint21.x/Win10 - Blender3.x - PP11.3(cm) - Musescore3.6.2

Wir sind gewohnt, daß die Menschen verhöhnen was sie nicht verstehen
[it is clear that humans have contempt for that which they do not understand] 

Metaphor of Chooks