Changing sprites on skeletally animated character?

Is there a way how to change a single sprite of a character which is animated from multiple parts other than using sprite resolver? We have a character and it has 100 different head sprites, we need to change just heads. With sprite resolver we have to have 100 PSB files with whole character skinned and rigged in it and in each has just its head changed so we can feed this to sprite resolver. Is there a better solution.
In "old days" we would animate the character by just animating individual sprites (no skeleton/skinning) so we just swapped sprites as always but with new 2D approach this seems impossible?