If they don't list a battery on ebay, contact @ayden_kry at Liquid Performance, he's a member here and has been great to work with, hooked me up recently with an Alta seat that they didn't have listed on their ebay site. Good luck.
Perhaps you could clarify why you are looking for a new battery?
If it is for a spare, you are probably out of luck. If you are experiencing an error or it is throwing a code, you might want to give us some details and some of the AOF members might be able to give you some technical advice.
I see you are listed as being in So. California. We have quite a few talented and experienced members in that locale.