There is a very high quality bar-end unit available for purchase from
Throttlemeister.
It is not cheap, but it is extraordinarily well made, and in my opinion, worth the price. I have used one for the last year and been very pleased with it.
Here's a photo that shows the original Honda bar end weight (the black one), and the Throttlemaster (installed) that replaces it. The company also ships a matching bar end weight for the other side, so that the mass and appearance are the same on both sides. About US$ 100.-
[This message has been edited by PanEuropean (edited 28 January 2002).]