I remember it due to the price. It was $8.99 for two Impossible burger patties. It's only $5.99 for two Beyond burger patties. It took me a month to get past the $8.99 price point for just two veggie patties. You might be able to find it at the same price point at Whole Foods as well. On that note, Impossible did mention that they were rolling out to supermarkets in 2019.
https://www.forbes.com/sites/christinatroitino/2018/11/08/im...