Joseph, you should travel more. One would think that any large frum community more than a few hours by truck from NY or Baltimore would have local brands of CY. I know you can get local CY milk in Detroit. I haven’t been to Cleveland in many years, but when I was there, they had local CY. Much to my surprise, the website for an LA kosher store shows they sell Fresh & Healthy and Devash!
And of course, most (all?) milk sold in Israel is CY.