You can buy your film here at B&H, Adorama (both of which are closed early on Friday through Saturday), or Calumet (which is open until 5 p.m. Friday and on Saturday, but doesn't have as much of a selection of film as B&H), but if you want B&W 220, better stock up now on TXP wherever you can get it, if you can still find any.

In New York you shouldn't have a problem finding 220 color film, but to be on the safe side, if you use a camera that isn't switchable between 120 and 220, it's a good idea to bring a 120 back. I got stuck in San Francisco once mistakenly thinking I should have no trouble finding TXP 220 at Gasser's (they didn't stock it anymore) or Calumet (ran out).