Just a heads up, you could of asked that question in your other thread instead of making a new one to ask that question.
Check in the Halo5 section of the FILE ARCHIVE> Halo 5: Guardians > Halo 5 Obj Files > Halo 5 Armour Assets - PART ONE > 00 H5 Spartan Base Pack.zip. Should be the first on the list within Download All Files. Was thinking there might be some confusion with it not being labeled as Under suit. The zip has both files for male and female. You'll also have the textures with them.