Walmart is your best bet. Subscribe to Matt Swider and Lord of Restocks on Twitter. They generally give a couple hours warning before a drop, which are usually at noon PST. You may need to subscribe for a one month subscription to Walmart +. Using time.is, refresh the store page at the exact second that the time ticks over, and click add to cart. You’ll be in a queue, but most likely you’ll be able to get one after a short wait