You'll need at least 5000-6000 grafts. You can probably get it too if go to Dr. Hasson. Mind you, to get these sorts of numbers you'll have to have good laxity (scalp exercises!) and be willing to accept a longer than average scar (front of ear to front of other ear usually). If you stick around the forum long enough, you'll figure out that Dr. Hasson does the largest sessions. Since you want density, that's the first place I personally would look. The smaller sessions aren't a good idea for your case, IMO.
Good luck. Bernstein charges alot from what I hear.