I've got only one HD600 driver and I sawed off the bottom cable connector for use in a DIY project. It's in good shape other than that, just a little dirty as of now, but I can clean it off no problem for you. No idea how many hours are on it. If you want to try jerry rigging something together, or have a broken driver you can destroy and steal the cable connector from let me know. I can try to solder some wire onto the voice coil leads as this will probably be kind of difficult. I'd only charge you shipping and am willing to lend a hand any way I can if you need a little help getting together whatever it is you're doing.
If this doesn't quite fulfill your needs I completely understand and wish you luck finding a spare in better condition.
Regards.