Try EBay. They show up from time to time. Usually about every 3 to 4 weeks when someone is parting out a car. You should also look at other parts you don't need as in many instances it's someone parting out a car and they will list the amp if you "ask seller a question" and just ask for it.
If there is no music but a loud scratching sound coming out of all the speakers then it is the amplifier. just pull it out to get the model number and buy a used one on ebay.
under the rear seat
No
Jurassic Park won the Oscar for Sound in 1993.
Jurassic Park won the Oscar for Sound Editing in 1993.
coil or the ignition amplifier
Rotten Sound was created in 1993.
The Sound of Fishsteps was created in 1993.
Dealer? Locksmith?
It's behind the back seat on the driver's side.
Sound As Ever was created in 1993-11.
Sound of White Noise was created in 1993.