I was going to post about giving Crown a fair shake on the repair process since they are simply top notch in CS but I see you already found out for yourself.
In 98 I had an IC150 from Crown (a pre-amp) where the pots were really getting noisy. I called Crown and they initially told me they didn't have replacement parts for a 20 year old product.
I get a call back a few days later: A tech had bagged parts for the IC150 at home. I send it in and for $68 plus they shipped back, they replaced all the pots!