** Note that this cover must be removed before using the cooktop.**
I wanted a protective cover for the new glass cooktop. I searched a lot online and while I did find some, they were either the wrong size or very expensive. In Bunnings last weekend I saw a BBQ cover on sale for $15.98. I cut it to size and it works really well. The knobs were too flush with the cooktop for it to fit under the knobs, so I cut holes out. I have enough leftover to use as a large benchtop mat. Note that the "right" side is gloss black but I use it flipped with a grey matt surface.
** I don't know of its status wrt induction cooktops.