Here's a great story about how to get invoice price.
How I have scored invoice pricing with 3.99% APR on my 370Z?
The reason your price is so hard to achieve is because you want them to quote OTD price, which is invoice + all other fees. The other fees are basically set fees, so you should be more concerned about negotiating the price of the car, not the ancillary things.
Find out what the exact invoice price is for the configuration that you are interesting in. Remember that this must include destination fees. Once you have that price you can request quotes from all the nearby dealers. Don't worry about the other fees because most of those are set. Just be wary of any documentation fees over $100. There really shouldn't be any documentation fee, but don't turn down a great price because of a $50 doc fee.
You should also request a quote from a nearby supporting dealer like Boardwalk Nissan.
http://www.the370z.com/boardwalk-nis...ng-dealer.html