plaxico80

I hope one of you experts out there can help me. I have a Kenwood DMC-J7R minidisc recorder/player. I know, it's old, but it's done a great job for me. Now here's my problem: My friend won this minidisc player in a contest and for some reason, they sent him two. He gave me the other one, but (again for some reason) he asked for my rechargeable battery. I gave it to him, thinking I would only use the DMC-J7R at home as a suppliment to my stereo. Now, I want to record some friends concerts, but can't seem to find a place to purchase another rechargeable battery or the optional alkaline battery pack. I know this is an older machine, but can ANY of you point me in the right direction? Any help you could provide would be GREATLY appreciated.