In addition to the Sanyo and Soubitez ones, there is one made by Union. The Union one may be the most recent, but I don't know when it was made. It's pretty neat since it was made to be cable operated; you turn it on/off with a control lever on the seat tube. It's also pretty easy to attach to a bike. I don't know how tough they are; it appears to be made of plastic or resin, but I have not seen one get damaged.

The Soubitez one is robust and well made, but I dislike the way it mounts to the bike. I have one that wouldn't fit I the bike I wanted to use it on; on other bikes it is prone to alignment problems. Worth a try if you can find one.

I have several of the Sanyo ones, and I cannot recommend them. They were nicely made, but there is something wrong with the bearing, and all the ones in my possession make an ugly squealing noise. They may be fixable. (Anyone want to try? Send me a message).