The is a curated collection designed for the lr-mame2003-plus libretro core, frequently used on platforms like RetroPie and RetroArch. Direct Link to Reference Set
set does not require a separate BIOS file or a "parent" ROM to be present. Pick-and-Choose mame 2003plus reference full nonmerged romsets link
The RetroArch playlist scanner specifically supports Full Non-Merged, TorrentZipped sets for this core. The is a curated collection designed for the
The primary host for the full collection is the MAME 2003-Plus Reference Set on the Internet Archive. mame 2003plus reference full nonmerged romsets link