I had the same concern and I was able to find one on eBay, shipping from the UK. More conventional suppliers were out with no expected restock date.
Further, I’ve been unable to get a Pi Zero W with the headers already attached. Soldering is not my strong suit and I completely destroyed a Pi Zero 2 W attempting as much. I’ve since found “GPIO Hammer Headers” at Adafruit, so I’m giving that a try.