Drop plates my friend http://sheldonbrown.com/home-drop.html save your money. They can be made to look aot better than Sheldons. The problem with long drop brakes (even though I have one but it was free) is that you loose some mechanical advantage. You have a brake already, if you can't find some small bit of metal b&q or similar plus one bolt, some wasthers or other spaces for the lower section and drill four holes.
Drop plates my friend http://sheldonbrown.com/home-drop.html save your money. They can be made to look aot better than Sheldons. The problem with long drop brakes (even though I have one but it was free) is that you loose some mechanical advantage. You have a brake already, if you can't find some small bit of metal b&q or similar plus one bolt, some wasthers or other spaces for the lower section and drill four holes.