From my experience, you have to go to Astoria to get some AMPs. I like New Cherry Spa for that. Much older providers who aren't much to look at, but they give amazing massages and service. I've heard that 51-19 relaxation in sunnyside is a spot, but haven't heard much about it in over a year.
If you don't mind my asking, where did you go in Manhattan to find quality latinas?