Thanks for your comments, here's a customised 3.75" Princess Leia Organa (Yavin Ceremony).
I never got hold of the updated Vintage Collection Yavin Leia, so I did my own version with soft goods skirt.
Head from TVC187 Leia (Bespin) with hair piece removed. Hair bun, torso, arms, belt & soft goods gown parts from TBS boxed Leia (Yavin Ceremony). Modified Legs section from EP1 Queen Amidala (Coruscant). The soft goods skirt is 2 pieces of a white Optoplast Microfibre Lens Cleaning Cloth stitched together.
I cut the existing gown in half and each side is glued and slotted into the sides of the torso piece to be more like the actual costume.