Are there any parts available for the B & W 801 series 2?

I friend of mine passed away and his wife asked me to sell his audio system. He has a pair of the 801 series 2.  All the drivers are good but one of the crossovers is fried. Does anyone work on these?? I don’t think any parts are Available. 
Looking forward Advice 

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They must be ordinary parts used for all crossovers, and therefore they can be rebuilt by a competent tech.
I'm not sure how you fry a crossover? I've never done that. Are you sure the crossovers are faulty?
That’s what his wife told me. I didn’t listen to them. Visually, the drivers are all intact
"... That’s what his wife told me...."

I would verify that the drivers work. I have my doubts.