Saeru's Anti-form Sora costume uses one black zipper (shortened) for the jacket, and another black zipper (spray-painted & cut in half) for the shoes.

  

Yui's Riku costume uses one white zipper (shortened & spray-painted) for the jacket. To compare the scale of the #30 zippers, a normal #10 zipper was used on the black shirt here.

Saeru's Ven costume uses one of our grey-tooth zippers (again, shortened & without the pull) for the jacket.

Saeru's original take on Rufus Shinra in a Kingdom Hearts style for the Twilight Town Turks design group uses two black zippers (with the pulls removed) for the jacket.