I ran across someone who is looking for a French steer tube die set for French threaded steer tubes. If this is you that I was referring to, Ebay item #200389992281. The man is Tom Hayes (Ebay: purplehayesbikes) and we have done many transactions with him. He is reputable. Good Luck and hope this helps.
Best Regards,
John Proch
La Grange, Texas