Hello Jay,
I figured it was Apex. They are well known in the NSX world here in AZ. It doesn't hurt to ask if Apex could help you out not because of any fault of theirs. They have done a lot of SC installs.
If you are just thinking about Alpine paying and that is that. Then what are you prepared to do if they say NO?
If you are prepared to "go farther"and take legal action then you might first consider what you will say and keep it brief. Then consult an attorney. I think an attorney will cost you the same if not more than the labor hours and that might not guarantee you anything.
If you are not prepared to take legal action then I would chop it up as a bad experience and a lesson learned. I feel for you but life goes on. Remember you will still need to deal with Alpine to receive any warranty work so no reason to burn bridges. It might be in your favor to keep them advised of the burden they have caused you in case of future warranty work.
For future owners I think we could all learn from your unfortunate and costly experience by buying the SC from the place that will install it. This way all the work and parts can be handled by the shop and if anything goes wrong then the shop will have to deal with the manufacturer and possible labor for carrying and installing a defected part.
Cheers,