Keeping AO and Shadows sepreate when baking out lightmaps for swappable assets in scene

Hello all,

What is the best way to bake out separate lightmaps keeping them completely separated from other objects around them so shadow information and ao doesn't get baked onto them and vice versa, keeping their shadows from appearing on other surrounding objects.
To add I have tried selecting the swappable objects meshes and turning off cast shadows and receive shadows but for some reason the shadows still keep showing up on the surrounding objects.

 

Bump!