I'm not sure that Luker's levers are Modolo. I have a set of NOS Mavic 451 brakes, which came as a set with levers that I'm almost positive predate the above. The 451 is the Dia Compe BRS 500, as seen at http://www.peterwhitecycles.com/imag...Cbrs500cal.jpg. The levers I have are almost definitely a matching Dia Compe set -- they need a special domed ferrule inside the lever, or the housing pokes through the body.

I've definitely seen the levers above on Ebay recently -- they're sharp looking. If I come across a lonely right, I'll let you know.