I'd try a Craiglist ad in Lawrence Mass or some other Dominican area. Lawrence is 22%Dominican.
1.Haverstraw (village), New York 26.95%
2.Lawrence, Massachusetts 22.47%
3.Perth Amboy, New Jersey 18.81%
4.Passaic, New Jersey 13.06%
5.Sleepy Hollow, New York 12.67%
6.Union City, New Jersey 11.46%
7.Haverstraw (town), New York 11.13%
8.Paterson, New Jersey 10.27%
9.Bronx, New York 9.99%
10.Manhattan, New York 8.87%