You're probably thinking of EvilInnocence's CrossDresser

https://www.evilinnocence.com/shop/store/shop-by-category/crossdresser.html

I've heard that it isn't being actively supported anymore, this is just hearsay of course, but EvilInnocense hasn't released a license for LaFemme 2 (AFAIK) which leads me to believe this may be the truth. It appears that the different figure fitting licenses are still for sale, here at Rendo and at home site. I have Crossdresser and have used it with some success to convert V4 stuff to LF.

Poser has the fitting room to convert clothing between figures, it's a bit fiddly but viable...