Legally, you should dump these files from your own hardware. However, community consensus often points to the Internet Archive (archive.org)
If you are trying to emulate the PS Vita on a PC, Steam Deck, or Android device using the Vita3K Emulator, you do not need a traditional hacked "BIOS dump." You need the official Sony system packages to render text and system modules properly. ps vita bios best
On the same Sony page, download the Font Package if prompted by Vita3K. This ensures in-game text displays correctly. Legally, you should dump these files from your own hardware
Many PS Vita games use system-level fonts for menus and dialogues. If you do not install the official font package, text in your games may appear as broken blocks, or the game might crash entirely. Step-by-Step: How to Get the Best PS Vita Firmware Safely This ensures in-game text displays correctly