Originally Posted by Alinlondon
I got a really good map of BA from Stanfords in London produced by National Geographic and called DestinationMap. It covers the whole of the city centre and has boxed details of La Boca, Belgrano etc, a subway map and street index, it is laminated so will not split at the folds. New York should have a specialist map shop similar to Stanfords that carry the series.
This sounds like an excellent option. Just make sure to check the edition and get the latest one.... Buenos Aires has been building subways and other infrastructure like crazy so things have changed quite a bit during the last couple of years.