Purchasing the Japanese wireless keyboard

Does anyone out there know of any way that I can purchase a Japanese version of the Apple Wireless Keyboard. I've tried calling the Apple Store. I've tried ebay. I've tried Amazon.co.jp. None of those will ship to the US. I've googled for all combinations of words I can think of and cannot find anything that appears to be a legitimate way to import, or purchase domestically (meaning in the US), a keyboard with the Japanese layout. I am perfectly aware of the fact that OS X has methods of inputting Japanese characters using the US layout; I've been doing this to get by. Still, in my quest to learn Japanese fluently, I would very much like to obtain a proper Japanese keyboard. Also, I've looked into keyboard stickers, overlays, etc. and they are all completely unappealing to me.

Any ideas at all?