Maybe it's possible to order a new cable from sennheiser and destroy these to get the connector. But to get the cables in the connector, i will have to cut the connector into two pieces and glue it back together, something that can go wrong very easily i think, and it's ugly.
I thought; maybe these pins and connectors are something used in other headphones as well and available somewhere, but that does not seem the case. I guess i have to wait for Null Audio or some other company to come with replacement cable.
I went to Null Audio's site to check out the IE8 cable, and saw 'sold out', or 'unavailable' (forget which), and thought 'damn, gone already'? So I emailed their sales to get the scoop as to when they'd be out again, and got this response:
The IE8 cable was supposed to be released this month. However, we are experiencing some technical and tuning difficulties on it.
Has anyone gone about actually measuring the spacing and diameter of the pins? They look like, to my eye, standard .1" spacing. In this case you could probably use a plain old 2-pin molex type (or other generic) connector so long as there is no surrounding sheathing/plastic.