Steve is talking about the 50mm extended base Talbot Bullet mirrors. These are custom made by us out of brass, then chromed. See:
http://www.snakebite.com.au/talbotbu...base-p-19.html
Standard mirrors have 25mm high base.
For best visibility Raydot's on the windscreen are the way to go.
I personally prefer the look of the Talbot Bullet mirrors, but it all depends on what you are trying to achieve.