Loading new atlases part to my character

Hi everyone,
did any possible to change a part of spine without changing whole skin?
because i have a lot of part (like hats, gloves, shoes…) to randomize suit up,
so I have to set the texturepack to atlas on each part,

I have find someway like changing whole spine skin,
but export every each skin from spine will be disaster,
how can I achieve this?

I have find a way to soft my problem,
the point is export json file must include all attachment image,
even if I have a lot of part,
still need to pack in to the json,
and then find the skin and get/setAttachment to replace it.