Surrounds are actually easy to replace yourself. Will only cost about 30 bucks apiece. You do have to make sure to get the voice coil lined up properly. There's numerous places than can do this for you too.
Well to replace them with original b&w woofers is crazy, i think in the 1990's I fryed one and the replacement was 450.00. Im sure any decent reconer would put new surrounds on for good price.
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