I uploaded a larger version (20 cm diameter): http://shpws.me/BXHq (available only in plastic)
(Note that shapeways has discontinued ceramics but is experimenting with porcelain - and all materials, except ceramics, seem not to be food-safe?)
I originally made these models as kinda 'cheap' versions. If you are interested in a full-scale model, I guess you can find kylix replicas online.
However, I do not know how porcelain at shapeways will be priced - ceramics was rather cheap from what I remember.