Battery Replacement?

Where can I find a replacement battery for a Choro-Q MarioKart Wii car? As far as I can see the battery is a Fullriver 3.2V LiFePO4 that's around 15mm in length and 10mm in diameter. It's cylindrical with a plastic wrap around it. Unfortunately, it appears to have leaked over any other identifying information. I've tried searching for this battery, but without the model number I'm coming up short. Any ideas?