For many years, Iwata has put their label on compressors made by Sparmax in Taiwan (Republic of China). They (Iwata and Ding-Hwa) took the effort to maintain quality control. The Iwata/Ding-Hwa airbrush compressor are well received in the market, but considered pricy.
Paasche imports most of their compressor from Mainland China. Badger also imports, but never said from where.
There is no reason that an American company cannot team up with a manufacturer in Mainland China (People's Republic of China) and make high quality compressors. The technology is nothing new except good quality control.
If you take a look at the Dormitory refrigerators sold for $100 at Walmart, you wonder why no one imported a super quiet airbrush compressor using the same motor from China yet. Fenghua makes one like that already.