I get mine at my LBS.
Vittoria is a pretty popular brand of tire, I would expect your LBS to have an acct with a distributor, so special ordering a pair if they don't have the tires in stock shouldn't be an issue for the LBS.
I really try to buy my goodies at the independent LBS, "shop locally" and all that. If they know you want something, they'll generally order it for you. (and if you know an online price, they might be able to match it) I'm ordering my 2nd Brooks thru my LBS, and they will match Wallingford's price.
"If Americans want to live the American Dream, they should go to Denmark." - Richard Wilkinson