The sub-woofers in the rear of my 1998 XK8 Convertible with the premium sound system are completely shot. For now, I've just dialled out all the bass but I need to replace them.

I've seen a few posts which mention Kicker speakers but they aren't readily available in the UK (although they are such good value in the US, that it might be worth paying the carriage).

Have any of you UK based owners had any success with locally sourced alternatives?