First off sorry for bumping an old thread, I made this post a long time ago and the manufacture thing did not work, they never shipped me anything. I had to try and order them from beyer US, but after a bad experience with beyerdynamic US, I went and did a bunch of research on replacement pads. Here's some info I complied (for dt880 only).
There are 2 different types of ear pads and 2 different types of headbands, beyer also offers replacement foaming (the stuff covering drivers). The way to distinguish between them is with the order number.
356.409 - dt880 replacement headband (stock 2003 ed.)
426.679 - dt880 replacement earpads (stock - velour 2003 & 2005 ed.)
333.395 - dt880 replacement foaming
407.119 - dt880 replacement earpads (nonstock - black pleather)
340.502 - dt880 replacement headband (stock 2005 ed.)
biggest thing to watch out for is the headband, as ordering the wrong headband will not work with your phones. ordering the wrong earpads isn't so bad, as they will still fit, but the velour pads are much better both in sound and comfort (the pleather seems to restrict the sound and makes an echo-like resonance). I ordered "dt880 headband and earpads" from beyer us without specifying which type, so they sent me the black pleather earpads and the 2005 ed. headband. my own mistake, but from what i've seen the only place in the US to get ahold of these replacement parts is directly from beyerdynamic. I've seen -many- uk/eu sites offer these replacement parts, but they always charge ~25 euro for shipping to the states. I'm gonna call beyer US again when their representative comes back (he's often away or gone its puzzling) and hope they still have the old model's replacements in stock, if not i'll have to bite my tongue and maybe do a bulk order from the UK to hold off on shipping costs.