Use and edit these to your requirements. If you want the asari or clothes in another colour, you'll have to recolour the texture files, as I've used default textures except for removing Cerberus/N7 logos, and complete overhauls for the long dress and the work gear. I recoloured those because they were a strange colour; I've included a PSD for these, so you can get the original textures if you want them. Or you can look through my useful texture gallery: [link]
already did a bunch of asari, don't miss those too: Mass Effect and all its assets belong to EA/Bioware. No copyright infringement intended; this is fan-created work for non-commercial use.