You could buy a 2.5-3" foam pad from a fabric store, cover it w/ something and wedge it in there so it looks seamless to the eye.
__________________ ~ A friend told me I was delusional. I nearly fell off my unicorn. ~ °¨¨¨°ºOº°¨¨¨° Ann | Pfeiffer | Marcel Verdel Purcell | Wylie | Artie °¨¨¨°ºOº°¨¨¨° |