I'm assuming that's if there's an OBJ for the outfit. If it's all DUF, I don't know that Creators Toybox will work, as it only runs in Poser, or am I missing something? I assumed, and I could be wrong as I've not updated DS past 4.0 Pro, so don't know for sure, but I was under the impression you don't need the OBJ when working with a DUF item because of the attendant data files.
I always inclede the obj with my products.
If it is just a duf, one can still selevt the duf file in the scene tab and export it out as an obj.