I found it frustrating to not have any muscle normal maps on the hub that weren't NC, so I decided to commission @WeebUVR to make some for me. With Weeb's permission, I've uploaded them for everyone to use universally. Thanks man, you're the best!

Note:
For the female gens normals, use the torso. For the male gens, use the decal maker plugin and overlay any existing gens normal texture that you like.