Where can I find an official Nintendo Wii lens cleaner in stores?

I need to clean the lens of my Wii and the official site is out of stock until next year. I'd like to clean the lens before Skyward Sword comes out. It has trouble reading some dual layer discs it could read before and the discs are completely scratch free. Does anyone know where I can buy an official lens cleaner in a retail store? The official site says they're available in select retail stores, but gives no indication on what stores they might be.

Any help would be much appreciated.

They're hard to find. You have to hit ebay for them, as they're given out during game promotions and conventions.