To achieve this, I replaced her torso and arms with those from a TNBA Harley. I had to Dremel away Harley’s details, of course. (Catwoman might have been easier to work with, but the uni-boob wasn’t accurate for Roxy.) I used a little Magic Sculpt to align the waist, maintaining the swivel joint there. I was careful not to damage the legs or head, as I didn’t want to repaint any of those areas. The hair required a little fill-in with Magic Sculpt where the coat used to reside.
What a ride!