Would you kindly advise me what kind of work I would need, as well as your availability.
Typically to obtain any sort of results in the crown, a very large number of grafts must be transplanted. In your case, I would estimate a procedure of 1800 to as many as 2200 grafts into this area. Essentials to achieving a natural appearing result include the placement of the grafts in a radial fashion, and in your case, because you have dark hair, the use of exclusively 1 and 2 hair grafts.
Done properly, your results should be quite nice- not really thick however. I also suggest you consider going on Propecia to help slow down the progression of hair loss.