I received the following email from Jason @ Marvel today:
Sorry that Diamond had not gotten back to you with your request.
While we personally don't have X-Men: Phoenix--Endsong at our offices, we do have similar trades that could function as a replacement for your damaged copy. Here's what we have:
X-Force: Sex and Violence
X-Men: Second Coming Revelations
Any of these titles interest you? If so, let me know which one would act as a suitable replacement for X-Men: Phoenix--Endsong and we'll send it your way.
I've let him know I'm happy with the level of service he has and is providing and that X-Men: Phoenix Rising will fill the void that Endsong has left. I think I should be able to replace my misprinted copy. Once I have my replacement from Marvel, I'll post a full update.