Not sure how close you are but I hear John Atkinson is pretty good.
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Most EE techs that build their own amp/s or even good ones that repair, should be able to help you out with most if not all bench test measurements.
I don’t know where they are, but these guys have one of the most advanced detailed bench testing setups for audio, even more than Stereophile, if you have a login password you’ll see what I mean.
http://www.milleraudioresearch.com/index.html Click the AVTech Tab