My Bach Strad is made in Indiana. I have a vintage 1980 one, so it's from back when they were completely handmade. Also, every lubricant I use on it is made in the good ole' USA.
I hope to buy a Torpedo Bag Classic trumpet case within the next few days. They are arguably the best in the world, and made right in Minnesota (where I live)! They are so strong that the creator (Steve Criesel) jacked his car up and put a case under each rear wheel, and the trumpet was fine.
I intend on buying some ON3P Filthy Riches this summer. I think it's awesome what they've been doing, and that there's like 6 people at the factory! They're what skiing should be.
Lastly, Phar North is out of Montana and has the stuff made in Georgia, and they make some great stuff. Check them out at
http://pharnorth.com