I'm hesitant about buying pretty much anything over a few years old. I bought a Bryston B60 that was about 8 years old at the time. If it didn't have 12 years of warranty left, I'd have passed. It's easily the most solid audio investment I've made. I just had it upgraded to current SST status for $120. How many companies want anything to do with gear that's 11 years old?
McIntosh is another company that'll support pretty much anything they've ever made. It's not free, but they'll bring just about anything to original spec, and sometimes surpassing it. McIntosh will sound closer to your BAT gear than Bryston will IMO. I don't have a ton of experience with BAT, so I'm sure others here can help more.
Conrad Johnson, McCormack, Pass, and Jeff Rowland all reportedly have very good long term support. I'd look into one of those, then place a call to see if they can do anything for the specific model and ballpark figures of how much. If they can't service it, ask them what they can service.
McIntosh is another company that'll support pretty much anything they've ever made. It's not free, but they'll bring just about anything to original spec, and sometimes surpassing it. McIntosh will sound closer to your BAT gear than Bryston will IMO. I don't have a ton of experience with BAT, so I'm sure others here can help more.
Conrad Johnson, McCormack, Pass, and Jeff Rowland all reportedly have very good long term support. I'd look into one of those, then place a call to see if they can do anything for the specific model and ballpark figures of how much. If they can't service it, ask them what they can service.