Given the legal gray area, "Lemuroid Roms Pack" is not a term you’ll find on mainstream sites. However, retro gaming communities on Reddit (r/Roms, r/EmulationOnAndroid), Internet Archive, and certain Discord servers share curated packs. Search terms include:
Lemuroid/ roms/ gba/ snes/ psx/ n64/ nds/ Lemuroid Roms Pack