Problem Solvers also makes clamp-on cable hangers, that mount on the stem. They will fit your 22.0 stem; I had the same problem when I put gold Mafac 2000's on my Peugeot. They come in siver, and are actually pretty unobtrusive. I also considered milling my headtube, but this a fairly intrusive (and spendy, if you pay someone else to do it) process; not something I would do unless I had a headset problem to correct. This hanger is also a lot more rigid than your old Mafac, thus improving your brake response. Just my 2 cents worth....
Larry Myers Portland, Oregon, USA curmudgeon1957@yahoo.com
PS- if you can't find the part you need, I probably have an extra I can send you.
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