I have a LED light on the bike and a dynamo set up front, but I wanted to
add a little generator driven light to the left seat stay. You can get one
easily enough in Europe, but I'm in the states. Any ideas?

It's for the standard Basta dynamo, btw:
http://photos5.flickr.com/5937872_033e4e7eea_o.jpg

I know battery lights are good and all, but I just like the idea of
another human powered light. I like the sound of the dynamo--it's
nostalgic. Only gets used for short trips, so never gets annoying. :P