Have they made a final good estimate/ count of the deaths that hurricane 
caused? I have beard figures 1200- 5000?
Last I heard, the official count is around 1200 deaths, with about 80% of those (960 or so) being in New Orleans. However, this is certainly an undercount, since some unknown additional number of corpses were swept out to sea or eaten by alligators.
Cite? Estimates?
Here’s one from Fox News that gives the count at 1242. Of those, 1003 are in Louisiana, 221 in Mississippi, 14 in Florida, and two each in Alabama and Georgia.
As for deaths in New Orleans, all I can find right now is this page.
Not being familiar with Louisiana, I’m not quite sure what to make of these figures. Mapquest says that New Orleans is in Orleans Parish, which isn’t listed. Presumably, the 828 at the morgue in St. Gabriel are from NO, but other morgues might have received some too. Maybe someone else can find better information on deaths in New Orleans? Incidentally, that last link puts the deaths in Louisiana at 1021 as of today (Monday), for a total official count of 1260.
As for bodies that won’t ever be found, the news drones don’t like to talk about this, but it’s known to be an issue. I don’t pretend to know enough about disasters to even hazard a guess as to this figure, however.