A while ago I was looking for a battery connector to replace the one that got mangled when an impatient teen-ager was inserting the pack into a portable dvd player.
I now have noticed that the connector is the same as that on the battery packs for (a certain subset of) Dell laptops - in particular the Latitude CSX series. It's the little plastic bit that has a set of plastic fingers separating the contacts.
I'm still looking; if anyone knows of a likely source, please say so...