Here’s a handy shopping list!
HAT from Arrow - https://www.arrow.com/en/products/jbm-004/pi-supply?q=Jbm-004
Case from Arrow - https://www.arrow.com/en/products/jbm-027/pi-supply?q=Jbm-027
Pi Shop has the hammer header and jig - GPIO Hammer Header (Solderless) - Male + Female + Installation Jig - PiShop.us
Amazon has plenty of SD card, power supply, and cable options.
If you don’t have the Pi Zero 2 W already, I can’t help you with that! They appear to be sold out everywhere.
Hope this all helps.