It can be done as either a MATPose or Material Room Material Collection. Mec4D created a switch set for Genesis that included M4, M5, S5, the Kids 4, V4, and V5 UVs. That set was tailor-made for the Material Room. Another set was created for Genesis 2 that uses MATPose files to inject similarly UVs through Version 6 figures, I don't recall the creator of that one. The method might be practical because there is no conversion of the original source texture and if someone doesn't mind creating a series of UVs for multiple figures then the package could be offered free like the Genesis collection.