Chows are a group 5 under FCI rules (I show under group 3)
Try searching for:
Cagnetta, Antonia C.da Pezzalda 70018 Sancandro di Bari (that is name and address)
Castelli, Marcelo Via Locatelli, 10 24050 Cividate de Piano (BG)
D'Amato Gerardo Via Altimari 25, 84100 Salerno
and try searching for a kennel name of Castelbarbara di Curwen, El'Ison Man Ku , Ceppo Rosso Chow Chow.
You can try writing the others or finding more info about them from the web. The show catalogs give names and addresses only.
And eurobreeder you can search by breed or by country. Italy has about 36 or so pages to go through.
Also remember that these breeders are generally smaller kennels and may or may not speak english. Also being show breeders, you are going to pay a bit more, so expect in the 1k euro and up range. Hope it helps.