While there are a multitude of Chinese made tube amps available online, there are also a number of small scale manufacturers around the world producing quality gear. Share links to these tube amp makers here. To start off:
Eric Chan based in Sydney, Australia who makes McChanson amplifiers: https://www.mcchanson.com/
At one point I considered doing a small production run of my 6SQ7/EL34 amp, but product liability (high voltage lawsuit, "No one told me not to poke a fork inside it") and customer support headaches changed my mind. Also not sure how well a $1200 product in this class would sell, folks would want to pay Reisong A12 prices and the parts cost more than that amp retails for.