I found two possible options. Repair or replace.A quality sound shop that sells amplifiers and speakers to the music trade should be able to rebuild the original as long as the problem is the surround and not the voice coil. This usually an inexpensive fix . I purchased 2 Pyle PLPW6D dual voice coil woofers . They required modification to the mounts (used a Dremel tool) and they work wonderfully . I am now replacing the head on the system and discovered that although car audio systems are black, marine audio systems are silver and will blend into the dash better. You can usually find the same or similar systems in both.The marine units also have the advantage of having coated circuit boards that are water resistant .