Over on The Paceline, one of the folks lost the derailleur on his CF bike (the hangar bent but didn't break). He asked about an inexpensive hangar alignment tool. One of the replies pointed to this tool:
MTB Tools Mountain Bike, Bicycle Derailleur Hanger Alignment Tool
I poked around the seller's listings and saw a number of inexpensive tools. I asked about their source. The response:
We make everything ourselves in El Cajon California
Seems like a win/win - inexpensive and US-produced. I have no direct experience yet with any of their products (and many aren't for our C&V steeds), though I just bought that hangar tool.