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Adcom GFA-565 Capacitor Replacement

I own two Adcom GFA-565 mono amps. One began to thump while in use, so I brought both to an authorized service center. Tech tells me that he is finding DC across speaker leads on both amps, and that oversize capacitors need replacing and that he thinks Adcom no longer makes them. I asked for alternatives, he said "they make great anchors". Is there a place I can obtain original or acceptable substitutes for the capacitors? THANKS!
schmengie_mcs7750

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gander2
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I just bought Adcom GFA-565 monoblocks and they thump the speakers on startup, but after that I'm not finding any problems. Is this a problem that can be fixed? According to Adcom, this is "normal" for these amps (yes I have that in writing). Is this true? And is this different than thumping in use, as noted above? I would like them NOT to thump on my Maggies.
Thanks,
Gary
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