There is nothing MPA related on 42nd St.
Where in NYC will you be?
You can check the listings in the free papers, The Village Voice and The New York Press,
In Queens I would recommend The Queens Tribune, another free paper which has ads mostly for the Flushing area.
You can check out www.utopiaguide.com
If you can read/speak Chinese I would try the Chinese language papers, such as Sing Tao. Or for Korean one of the Korean language papers.
In general I would say that NYC is not mpa friendly, not very economical so bring lots of money!