ACF & Nuova Point do cups in various shapes - bowl , tulip, wide bowl, tall tulip :p
There is an ebay seller who might be able to do a large amount. PM me if you want details. I know they come in ~160ml size, but dont know if there is a larger volume one for you to use. White and brown glaze are the two most common colours.
There is also Australian Fine Chine (AFC), Ive seen a couple of respectable cafes here in Melb using them for their capps. The volume must be around the 240ml mark. Only seen in white.
As to where to purchase from.. Chefs Hat in South Melbourne (opp the market) has AFC porcelainware and they offer you folks in the idustry a discounted price. Not sure how their bulk order discounts work...
Maybe contact a couple of roasters about the italian porcelain?