I bought a full set of metric deep offset open stock on the Sears website, 3 months ago. They were 100% USA. At the time, they were on discount, and took coupons, so the full set bought individually wasn't a bad price.
Don't bother with the Harbor Freight ones. I had those and returned them. They are made in India, and are sub-par compared to Harbor Freight already low China standards. The smallest couple wrenches of made in India Harbor Freight deep offsets you can actually bend in your hand. They look to be cast, not forged. Looks like they pour cheap recycled metal into a mold for these.