Import bones from skeleton to skeletal mesh?

Hi, I at one point added bones to a skeleton, they have no skinning but are important for attaching objects to and animating within Maya, MotionBuilder, etc etc… and later on created some skeletal meshes that do not have those bones in Character Creator… those extra bones I added to the skeleton are not in the skeletal meshes, which causes attachment issues and I was wondering if there was a way to get the bones from a shared skeleton asset into the skeletal mesh asset without having to go out into Maya and add bones there.