Can't remember quite which, but I bought a kit of 'O' ring spares a wee while back on the basis that these might be useful sometime.
'Sometime' arrived yesterday when I finally surcumbed to pressure from HID to do something about the dreadful SCART cable that keeps on drifting out of connection on the back of the TV. Two screws as clipping points and a large 'O' ring over the SCART plug - now why couldn't Panasonic have thought of that ?
Rob