If you are looking for a "solid piece" (a high-quality or reliable version) to replace that file, the most reputable community hubs to find them are:
: A broad repository where you can filter by "Police" and sort by "Most Downloaded" or "Highest Rated" to find stable, well-regarded replacements for the police3.rar slot. Key features of a "solid" police3 mod usually include: police3.rar
: Support for the Emergency Lighting System for realistic flashing patterns. If you are looking for a "solid piece"
: 4K liveries that don't blur when viewed closely. police3.rar
: Proper optimization so the car doesn't disappear or "pop in" at a distance.
: The premier site for police-related GTA V mods. Search for "Interceptor" or "Police3" to find high-detail models with realistic lighting (ELS) and liveries.