Have you checked out RubySketch's Free 3D Component Library? If you want to jazz up your model with some real manufacturers products from kitchen appliances to fixings you should check it out: https://3dlibrary.rubysketch.com/
Alternatively, you could Check out the SketchUp 3D Warehouse which you can access by going Window > 3D Warehouse
inside of SketchUp (or head here https://3dwarehouse.sketchup.com/?hl=en
). There's a lot of cool components here ranging from cars to furniture to complete houses. You do have to be careful to not overdo the amount of 3D warehouse components in your model though, as detailed components can cause SketchUp to crash.
Hope this helps!