(Pete) There are a couple of websites that have a bunch more French manufacturers on them than I list here. I can't recommend them highly enough:

Luthier Vents. It's in French, but there's a link to use Google Translate. The webmaster can also read and write in English.
ARCHIVES MUSIQUE, FACTEURS, MARCHANDS, LUTHIERS. Also in French. You might want to use Chrome with the auto-translate feature.

Please note that both websites do not concentrate on saxophones, but on all French-made instruments. So don't complain to them or me :D.

You should also check out
"Saxophone Manufacture in Italy: A Short Survey," by Emanuele Raganato.