My experience with vintage French hubs is bad, in that the cones are made of soft material and pit a lot faster than Campy hubs, even the lesser Campy hubs such as Tipo and Victory/Triomphe.
Check your hub for the size and number of balls. Campy hubs in the freewheel era mostly took 10 x 3/16" balls in the front, and 9 x 1/4" balls in the back. Ditto with Shimano and Suntour. If your hubs follow the same spec, then there is a strong chance you can retrofit your hubs with a complete axle/cone/ball assembly from one of these manufacturers - a definite upgrade from mid-range French hardware.