According to the Manhattan User's Guide, Obikà, a "mozzarella bar" that originated in Rome, will open a location in midtown Manhattan (in the plaza of the IBM Building, 590 Madison Ave., between 56th and 57th) in early December. MUG says:
Obikà became a hit in the Eternal City when it opened in 2004, conceived as a kind of sushi bar that plied its trade with buffalo instead of fish. You can expect the same mozzarella sampler and other small plates starring the Italian cheese.
Purchase Mozzarella di Bufala for $9.99/lb at iGourmet.