Dr. Don's is the place to send it if you want it fixed right.
http://www.doctordons.com/
If you are an Audiophile and not a NCRS type, then rip out the 18 year old "Blows" and put in whatever floats your boat and your budget.
Be sure to save all the old stuff of course in case the next owner of your car is a NCRS kind of guy/gal.
DO NOT hack up the radio bezel, they are made of "Unobtanium".
You will pay $$$ if you fubar your original.
That being said, I've only turned on the Bose in my Z on one occasion.
Don't need it. There's a symphony playing right under the gas pedal.
TomC