Fairway definitely has it. as for other stores, i'd say that friedman's on 13th avenue is doing a great job on expanding their cheese section (beyond sliced american cheese) so they probably have it too as would shoprite on ave i and mcdonald.
ard (waiting 6 hours) stuffKosher Marketplace (Broadway & 90th) in Manhattan has both the Italian Parmesan and a couple of similar cheeses suitable for grating over a soup or pasta. The really hard (waiting 6 hours) stuff
Great Italian kosher parmesan at Zabars. Check first if they have it -- they ran out a few years ago, for a while. Haven't bought it recently, but it's good. I always keep a chunk in my fridge.