Oh my. Look, this is really simple. Stop talking to the damn dealer and start getting to work. It may take a total of 5 hours for YOU to do the work, and that's if you are completely clueless. Do a search on Prime and you will find ~20 different threads explaining how the regulator does not need replaced.
Peel off your inner door garnish by simply unscrewing it. Find the rails. Add lube, slide window, repeat. Reapply door garnish. Proceed to service center, present midle finger, move on.
Why are these dealerships getting so damn greedy? I know the RL isn't selling as well as they like, but damn. Do us a favor. Ask your dealer if they have the new oil filter for the NSX. If they say yes, sock em one for me.