Something - I assume from feeling around that its got some form of plastic mesh in place of springs - has snapped in the back of my drivers seat. This is obviously wear and tear related but I can't find any other references to it happening on here.

It hasn't affected the actual feel of the seat yet, except for the fact that I can actually hear it clicking if I shift in the seat or on braking. It actually sounds as if something is hitting the back of the seat from behind but there isn't anything.

The seats are generally in good nick for 82,000km - the lumbar rip hasn't happened for instance and they've held up better than my old 1.1's did after 50,000km - so I'd hate to have to replace it entirely. Are the internals easy to get it and purchase replacements for?