Oat milk can be found at most grocery stores nowadays. Several large plant-based beverage brands carry a kind of oat milk. If you can't find it at your regular grocery store, check health food stores in your region and you should find it. Here in Canada, we don't have the amazing Oatly (in most stores) that could be found all over Europe. However, a few brands do carry oat milk over here. My personal favorite is the one by Earth's Own (you can also buy it online). A barista blend is also a great option for an extra frothy latte. Thankfully, many coffee shops, including Starbucks, now offer an oat milk option as well.