I don't 100% remember nblx posting them, but I do know he has them. You should try pming him.
I'm also not sure about using head texures for the template. I know that they're based off the head text, but I don't know if it's completely accurate. It could be off slightly off or majorly off when you check it out.
Joint textures are always named j_(bodypart).tga.
Joints that are on the left or right side are respectively named j_l_(bodypart).tga/j_r_(bodypart).tga
the (bodypart) is just the joint name. pecs, wrist, knee, e.t.c. The centralized joints - neck, chest, lumbar and abs - don't have a left or right indicator. Those are just j_(bodypart).tga