Thanks kingofthescratchmonkeys, but I believe that old DuraAce had a different shift ratio to modern Shimano -
ctc[dot]org[dot]uk/DesktopDefault.aspx?TabID=3946#Shimano
Yup- found the link, but it says the new mechs have a means of using old levers via different cable routing.... guess my old trusties will stay in their box!!
I would recommend Tel....reliable chap and his stuff is good...i've loads of things from him and found him honest and decent seller of cycle bits and pieces.