refoaming sennheiser headphones

hi,
i need a bit of help here. the foam on my pair of sennheiser hd600 has vanished i.e. disintegrated. this is common in humid climates. foam surrounds on speaker units also melt away with time.
does anyone know any shop or expert in kl/pj (or anywhere in malaysia) who can refoam my headphones?

you could always email sennheiser HQ and ask about replacement parts. However, if all else fails, you could use some home sponge and cut out approx the size of the earpads and stick it to the HP.