I know it's not UES, but have you tried Whole Foods? I'm in South Jersey and we get non-homogenized milk there. You've got locations at Union Square, Chelsea, Tribeca, and Columbus Circle.
Whole Foods definitely does. The brand is Ronnybrook Farms. I bought it there plenty of times. I also saw the same brand in Grand Central Market, at the cheese stand.
Ronnybrook is unhomogenized and sold in glass bottles--you can get it in a few places. Check their website. It's not organic, if that matters, but it's grass fed.
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