They donated a few to universities and museums on the basis that they were disabled. One museum has a project to reactivate and improve one - so its not running original specification. Others seem to have been 'hidden'.
I doubt GM would bother persuing a university to reclaim a project car or indeed an individual for keeping one after so long and with the adverse publicity, especially after having so much tax money thrown at them.
Plus of course if they return to EVs the EV-1s surviving would make excellent advertisement vehicles.
We never got them here so I've never seen on in the plastic, so I'm not sure they ever existed