I'm a "plus sized" guy my cycling clothing comes from "USA sized Aerotech Designs) my frames and some handlebars from some of the most skilled bike builders in the world Taiwan, Japan (some shifty bits, handlebars, stem, and a cranks), Germany (my dynamo hubs, lights, racks, and some panniers), France (Rims, saddle, bar tape, panniers), USA (hubs, stems, seatposts, brakes), China (my carbon wheels), finally a couple of bikes have shifty bits from Campy since they're bottom of the line I assume they're built in Poland.
It's a global word out there, buy the things that work for you best