There are no companies that make reasonably priced mini fridges outside of China. These fridges have a lot of parts and putting them together in China is far cheaper than anywhere else. Unfortunatly, even the American brands are just licensed by Chinese companies. There are a couple of companies that make high end under the counter refrigerators in the US.
Sub-Zero has been making high quality refrigerators for over 70 years. They are considered the best in the home refrigerator sector. Their refrigerators are made in the US. They make several small models that are made to be installed under the counter or below counter height. They are expensive, but well worth the price for the longevity.