Does anyone know of a small radius pipe bender to replicate the bends of original brake pipes?

I've got one of the normal ones a bit like this... http://cgi.ebay.co.uk/3IN1-COPPER-PI...item414d1795c0

...but when doing say a 90deg bend the actual radius is bigger than the std pipe. It's not a major problem it'd just be nice to make them spot on!