I got a pair of these speakers that I bought about 10 odd years ago. Now they're suffering from the dreaded foam-rot. I'm a newbie when it comes to speakers and speaker-repair though, so I need some help here.... When I remove the cloth covering, there are 3 circles (I dunno the tech-term for them...) 1 small on top, 1 medium in centre, and 1 big at bottom. The top 2 seems fine, but the big one has lost most of it's foam. In Singapore, I have yet to find anyone who provides foam-replacement. Other than ordering online and paying for o'seas shipping, what other alternatives do I have? Thanks.