Don't know exactly how true it is (so take it with a grain of salt), but i remember being advised from one source, all autos were white and either all 2 or all 4 door (can't recall that bit....) and the were only something like 250 or so...
The autos are rare and I have yet to see one in the flesh, but I recall someone on here a few years ago had one they were restoring... The auto tunnel would be a dead giveaway if you were looking for it specifically as it is wider than a manual tunnel....