You can find sweetened condensed coconut milk (or oat milk) at specialty grocery stores like Whole Foods, or online. If all you can find is a 7.4-ounce can instead of an 8-ounce can, that’s also fine. Nature's Charm is the brand I use for condensed coconut milk (they also carry condensed oat milk). Let's Do Organic and Nature's Greatest Foods also sell condensed coconut milk. (affiliate links).