I have attached a few photos (first time post upgrade) to indicate what I am thinking. The Ideale 90R was an option on some of the PX90s according to http://www.classicrendezvous.com/Fra...10_history.htm, and the aluminum structure would really complement the other bling you are doing.

As for your question re Mafac, I have attached another photo showing the drilled levers, with black hard plastic covers and the actual brakes. Silver cable lines might look cool.