I was hit by a sudden panic two weeks ago. So I've been busy. However, I'm now less stressed.
The piece is 21.5" long by 2 5/8" (52 x 6.5 cm) wide, with round ends. Interface the piece with fusible. Find a zipper of about 24" (60 cm) in length.
Next, you have to trim the open ends of your zipper and secure them inside with a couple of hand stitches.
Coat the wrong side of the leather piece with rubber cement. Let it dry a bit, then place your fleece piece on top, patting it down so it sticks to the glue.