I might have to disappoint you, but almost nothing is made in US and Europe anymore, bar from high end, computerized, and professional grade equipment, that would cost many times over. I am almost certain that sander is made in Taiwan or China. Cheaper than to make it in Poland or Hungary and Taiwan has been making equipment for US market for some time now, even in pro tools - milling machines, surface grinders, etc., so the quality is OK.
I try to buy US made machines, but all mine are typically over 20 years old. Anything newer is imports, even on big brand names - made in Taiwan, China and Mexico. Still prefer old US made to imports. The build quality and durability is evident.
M