DaFont is a massive archive. Navigate to the Basic > Sans Serif section and search for "geometric."
A widely used geometric sans-serif with a similar modern feel. Questrial: century gothic bold font family free download top
FontZone has an extensive library. Type "Century Gothic Bold" and you will find the file. The site is ad-heavy, but the font files are generally clean. Do not click the "Downloader" ads; look for the direct download link. DaFont is a massive archive