Felt the need to commebt on this as they did a some capacitor changes in my LittleMark 3 a few years ago. Was maybe 30 quid...
Power stage blew. Got in touch, sent it them, got a quote from a nice chao I er the phone the day they signed for it. Paid it straight away and got it back the start of the next week.
They also don't have a monopoly, maybe you haven't tried Google???
Sent a Genz Benz head to fender UK for repair as they dealt with supply/warranty repairs. Needed the same job doing, but took them 6 months, charged me over half the cost of the amp and they just swapped the whole power module PCB out.
This is of course my own experience, and only two examples of lots of work I've had done from lots of providers and lots of different amps. Maybe I should stop breaking them...