Asset Preview use in game

I want to use the preview of an asset, like a cube, in game on the inventory screen. Is there a way to do this at runtime or is there a way to get that image in general?

It is not possible to get this preview image, but what you could do is place the asset into the scene, but not view-able by the main camera. Then you create another camera that can see this object and it draws to a RenderTexture. You then apply that RenderTexture to a quad on your inventory screen.