Your retexture works really looks nice. I don't know if you have the old "Starship Creator: Warp II" game. But, it does have the materials your looking for. An Oberth Cutaway, and interior objects like rooms, transporters, shuttlebays, delectors dish, warp coils, computer cores and such.
Here is something you won't see everyday. To give you an example of using Starship Creator: Warp II elements. This is a Norway Class cutaway by c2x. -BR32