Sites where you can download the pack
PlanetMinecraft: https://www.planetminecraft.com/texture-pack/reimagined-gui-dark-n-purple/
Modrinth: https://modrinth.com/resourcepack/reimaginedguidarknpurple
CurseForge: https://www.curseforge.com/minecraft/texture-packs/reimaginedguidarknpurple