Another company that Henry Kloss was associated with was Tivoli Audio. They make nice table radios and such that are based off designs from Mr Kloss' days at KLH.
BTW, as to Adcom's model numbers, the GF part is an abbreviation for Great F*****g and then the last letter stood for Amp, Preamp, Tuner, etc.
A place that I had recone my JBL L166 speakers is fairly local to me. Circuit Shop out of Grand Rapids MI.
http://www.circuitshop.com