Man, you NOT having a good day!
First a defective amp, now your tweeter gets pushed in? I wouldn't go to Vegas anytime soon because your mojo is in the wrong place!
First and foremost, can you hear a difference? If you can't hear a difference, I'd live with it. If so, I'd call the manufacturer and see what they recommend or price out a replacement (shouldn't be that bad). If all else fails, I saw a nice ad for a dent removal system called "Dent-B-Gone" or something...of course that was for your car ;).