A blog for the Bloomingdale neighborhood in Washington, DC.
I just used these relatively local guys and they were fantastic: Abay Iron Works (see http://www.yelp.com/biz/abay-ironworks-washington or http://abayironworks.com/) They were prompt, efficient, well priced, on time. Can't say enough good things about them.
Reliable locksmith has done this for me a few times and I've always been happy with them.
I've used Bini"s Iron Works, and was very pleased.