Open Roblox Studio. Go to the "Toolbox" (Asset Manager). Set the filter to "Models" or "Places" and search for "Prison Life Portable." Look for assets uploaded by users with high reputation or groups dedicated to open-source development.
Communities like HiddenDevs or the official Roblox DevForum sometimes share "Baseplate models" of popular games. Search for "Prison Life Open Source." uncopylocked prison life portable
If the original creator (Aesthetical) set the game to "uncopylocked" themselves, or if a developer explicitly allows copying via a license, it is safe. Open Roblox Studio