You typically won't find containers of "fresh" zest in the produce section. Instead, look for these versions:
If you’re heading out to the store now, keep an eye out for these reliable brands: Lemon Zest Spice
Occasionally, specialty zest or citrus-flavored sugars and salts are stocked near the flour and sugar.
Here is a blog post draft that answers common questions about finding and using store-bought zest.
We’ve all been there: you’re halfway through a recipe only to realize it calls for "one tablespoon of lemon zest," and you don't have a single fresh lemon in the kitchen.
Look for jars labeled as "Lemon Peel" or "Granulated Lemon Peel." Major brands like McCormick and Spice Islands sell dried, shelf-stable versions.