Zumba Belt

I've just purchased Zumba for the Wii which I really enjoyed last night.

What I'd like to know is does anyone know where I can buy an additional belt from. I've tried searching on Amazon, Play.com, Zumba (uk site), google, but I'm now at a loss. I'd like another belt so me & my daughter can play together

The game & belt only cost £19.99 from Amazon & I took advantage of free P&P.

Thank you