How can one create a plugin for something that is not accessible?
The main problem is not how to access the models, why the models are not free give-aways: Google licenses them from different commercial content providers or creates them on their own. If we could take them, it would be (unfortunately) pirating.
Interesting is that OSM has some efforts to make geospacial data available under free licenses. This is what we need, and it seems governments/administrations are more likely to release data into the open rather to an open organization than under the control of a proprietary company.