Need recommendation for someone to analyze and repair Burson amps.?

Until recently, I had used two Burson Timekeeper amps to power my main system. They sounded great for years until both stopped working recently Fuse replacement didn’t help

Won’t bore the group with the issue but I was shocked that Burson (based in Australia) doesn’t have or won’t give the name of a North American repair contact because the amps. aren’t the current model. I’m guessing the Timekeeper model stopped being made 5 years ago but I may well be wrong.

Anyone have positive recommendations for someone who can analyze and repair the issue. The amps. are solid state Class A/B if that matters.

I am located not far from Boston but the repair person’s location doesn’t matter much as the amps. aren’t huge and can be shipped fairly easily.

Will admit I’m disappointed with the email thread with Burson. They make a terrific product but should be able to recommend someone to address something made circa 2014.

Thank you.