These are the two closest off the top of my head:
Cha Cha Tang's is pretty strong but it tastes salty.
M Star Cafe's is just as strong.
Mei Lai Wah's is my go to place but is lighter - they use light cream w/ tiny ice crystals and simple syrup.
M Star Cafe
19 Division St, New York, NY 10002
Cha Chan Tang
45 Mott St, New York, NY 10013
Mei Li Wah
64 Bayard St, New York, NY 10013