I rarely drink or buy milk but I like the 3.8% sometimes for me and my cats. They only get a whisker so to speak
I like to add whipped cream or some of that 10% stuff to get the fat % up
On the non-milk side, this coconut milk is amazing
Ripple Pea Milk is great too, very smooth and somewhat satiating
Yeah, Costco and the asian market are probably your best bet. Might even be on their site too altho i have no experience buying actual grocery stuff online there, just other bigger non-food stuff