I don't know if anyone else knew or discovered this but (thanks to Google Maps,) two out of the three Mobil Directos in Culver City, CA are still currently in place. I believe they're now defunct.
This includes a gasoline powered Mobil Directo located at he Veterans Memorial Park & Auditorium(Note the top part is missing):
Siren Archive:
Google Maps(New Version. I will use old streetview if requested) Oct 2012:
https://www.google.com/maps/@34.012791, ... e0!6m1!1e1
The second(Actually in LA at Braddock Dr & Sawtelle Blvd) was probably taken down because a small building is now in its place.
The third is on Warner drive and it is all in one piece.
Siren Archive:
Google Maps Feb 2011:
https://www.google.com/maps/@34.023418, ... 3WxsCA!2e0