Not sure if this is a replica or perhaps one of the original film cars, but a buddy of mine saw this on his way to work this morning and snapped a picture of it on his cellphone. Seen at the corner of Centinella and National near the Santa Monica airport.
It's not a very clear photo, so probably not easy to tell if it's a screen-used car unless it has really obvious tells.
Kind of a cool thing to see just driving around on the streets, though!
(edited to correct the spelling of "ecto" )