Because the design is in the public domain, many open-source foundries have created legally free alternatives or unaltered clones of "Antique Extended." These are 100% safe, legal, and often identical to the paid version.
Do not pay for a subscription font service just to access a single 1800s revival. Use the free resources above to find your safely. Archive Antique Extended Font Free Download LINK
Often lists files, but always check for the "free" tag. Because the design is in the public domain,
https://www.fontsquirrel.com/fonts/list/find/antique+extended a Font by Archive Type Fonts
To ensure you have the full character set and legal right for commercial use, use these official platforms: Archive Antique Extended, a Font by Archive Type Fonts