I kind of get what the OP is saying. The Glockenklang and TecAmp heads really do seem to be a step above most (or all) other lightweight heads IMO an IME regarding build quality, design and components to my ear. I think the 'made in Germany' thing has been taken a bit too literally here. I assume he is talking about those particular heads, which really are something IMO (of course, they have baked in tonality like all heads, which may or may not float an individual player's boat).
I have not experienced the quality and tonality of those heads in any others (output per spec'd watt, noise floor, distortion levels, quality feel, etc.), USA made or not. I would say the Demeter all in one amp (one space rack model) would be the closest to that vibe (i.e., quality components and build and 'pure tone').
That being said, unless the OP is purely driven by 'buying American' (whatever that even means these days with parts sourcing from almost everywhere), I would definitely not use 'made in the US' as any sort of indication of superior quality or whatever. I surely didn't buy my Glock because it was 'made in Germany'
Edit: If the OP is looking for a totally different tonality versus the two 'German' companies' products I listed above, the Aguilar stuff is VERY impressive from a quality/reliability standpoint, and is designed and fully assembled by a small crew in New York. Very impressive heads... virtually no 'problem' posts, honestly rated wattage, and that nice, signature, warm, fat Aguilar tone. The GK stuff, assembled in the US also (I believe they use the ICE boards like many others, so again 'made in US' is kind of a grey area to me) is also pretty nice, and reliability seems to be improving greatly with the current run of products.