Chris, I've been looking awhile my self. Did more web searching than an investigative journalist!
The item is a Minifin Rocker Cover, Rover noCAM6682. Ive web searched all of the English speaking countries, and most of Europe........its always the same...."Out of Stock", or "No longer available". If I find a couple, I'll let you know. If you find a couple, please let me know!
Cheers!