Problem solved. It was the forward bushing on the upper control arm.
After posting my question yesterday, I found I had some time on my hands, so I decided to disassemble the front suspension myself.
Took less than an hour to remove the upper control arm. Only when removed was it obvious that the forward bushing was destroyed.
Took the arm to my Maserati dealer and it turns out you can buy replacement bushings for the arm. Not the bushings that connects to the hub, but the 4 other bushings cost $250 from the dealer.
I repeat, for a 2007 QP you do not have to buy the kit which includes upper and lower control arms and hub. These parts would have cost $950 plus the huge labor cost that others have quoted on this post to install them.
I decided to replace only the bad bushing. Maserati did not have the tool to replace it so I went to my local shop where I was charged $20 to do the job.
Total cost to fix the problem was $270 plus sales tax and I still have 3 bushings that I have not used yet. If anyone needs them, they are for sale.
Total time to repair was 2 hours plus the time to drive to Maserati of Bergen County and then to my local mechanic.
One hint. When removing the arm, keep track of where the shims are.
Hope this info is useful.
Joe Vargas