Joined: Oct 2004
Posts: 2,947
Likes: 1
From: Absecon, NJ
Bikes: Puch Luzern, Puch Mistral SLE, Bianchi Pista, Motobecane Grand Touring, Austro-Daimler Ultima, Legnano, Raleigh MountainTour, Cannondale SM600
Your options for replacement narrows in that event.
Stronglight still offers a French thread headset in the A-9. I'm not sure of any other manufacturers.
Maybe with luck & patience a NOS one will show up on ebay.