Basically, nobody sells it, but you could technically produce milk in a way more animal friendly way. The current breads of cows all over the world have an influx in milk production, so even if you do not take the calf away and milk them manually, it would still be enough milk to use/sell.

This is all hugely theoretical unless you yourself have a couple cows that you milk for personal use or a small farm.

You are probably just anti-milk industry than actually anti-milk.