I saw this auction on Ebay I thought you guys might want to take a look. I'm assuming the battery mounts where the air box used to be.
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=34284&item=2427898161
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=34284&item=2427898161