They are on Ebay from several suppliers as well, just search "Lucas style round chrome door wing mirror". They are good as they don't vibrate and you can actually see something in them. The downside is that the view directly behind you isn't perfect as the angle isn't so good. I have a centre screen rear view mirror to improve that. They are convex as well so an improved view angle but things appear deceptively far away. I have them and overall the pluses outweigh the negatives I think.
