The fonts are proprietary to Sony. Distributing them is technically a copyright violation, but because they are system files necessary for emulation (which has been legally protected in cases like Sony vs. Connectix ), and because Archive.org operates as a library, enforcement is virtually nonexistent. However, you should already own a PS Vita console and legally dump your own system files to be 100% compliant.
: Click on the font package link to download it. The file might be in a compressed format (like .zip, .7z, or .tar.gz). font package vita3k descargar archive