If you wish to retain the original mapping but just want templates of each section then do the following:-

• Select all but one of the components using Edit/Select by/Material.
• Use the hot key "[" to hide these facets.
• Save this texture map.
• Use the hot key "]" to reveal hidden facets and repeat for each section.

Because you have not changed the mapping you do not need to save the OBJ. You can now create your textures using these templates and apply them to each material.