There are a couple breeders in/near new york i've seen around some forums. no names come to mind though.~looks~
(here's one on another forum i'm on: http://www.ultimatebettas.com/index.php?showuser=10169
) I think I've seen other member on bettafish listed as in new york aswell.
You could also maybe make a small flyer about bettafish.com or just wanting to start a fish lovers group in general and ask if you can leave it/some at your local fish shop?
I just happened to be stalking someone on another site(well, his fish) when he mentioned moving and iasked where and he mentioned the (larger) town next to mine.I told him where I lived and he said that's where he was moving but didn't think I would know about it(small town) xD. It was just luck.
He said he would normally sell the white HM male he's gonna sell me for $25 in aquabid and I believe it, his fish are gorgouse, but since he semi-know me I can get the boy I wanted for $15 <3 Gonna get him and breed him to my walmart rescue if she ever un-stress stripes. x.x she shows no signs of illness. Has places to hide, has clean water..but has been stressed since I got her about two weeks ago.>.> I think she just hates me cuz she's eggy and swims around fine,and eats(when i walk away)) but whever i go to look at here here come the stripes.