LG Xenon GR500
Wired Headphones
Bad News - I can't find one either. I found a guy who got an adapter from an electronic company in Hong Kong through Ebay. However, the vendor abruptly stopped selling it. I would want an adapter so I can use a cable to run sound through my car radio's aux port.
I found a wireless bluetooth option you could check out. Jabra BT3030.
http://reviews.cnet.com/headsets/jabra-bt3030-blueto ... »
I'm not sure of what the battery drain would be on it. Good luck!
I run my xenon all day w movies and everything. I get a solid day (16 hours) of straight use.