Pi Locator Checks Stock for the Raspberry Pi Zero Across Several Stores At Once
The site checks the stock at a ton of stores across regions. Here in the US, that includes Adafruit, CanaKit, Micro Center, and a few others. Just click the In Stock link on any listing and you're taken to the purchasing page. It's a little tool, but it really does make tracking one of these suckers down a little easier.