They are public record.
You can just ask the 911 center. Or, you can file a Freedom of Information request with the city.
911 calls are only allowed to be made public in certain states. Some states have banned the broadcast of 911 calls replacing them with written transcripts. There are sites such as 911 Dispatch Magazine which has links to various 911 calls available online.
Call 911 - 2008 911 Nonsense was released on: USA: 10 March 2011
911. her call has recordings of the gun shots and Eric and Dylan yelling.
Recordings - 2007 was released on: USA: 10 November 2007 (video premiere)
Gator 911 - 2010 was released on: USA: 9 April 2010
911 The Bronx - 2008 was released on: USA: 29 May 2008
Venom 911 - 2004 TV was released on: USA: 2004
Call 911 - 2008 was released on: USA: 30 July 2008
911 - 2003 was released on: USA: 13 March 2003 (Scarefest Film Festival)
Rescue 911 - 1989 Five Year Old 911 2-24 was released on: USA: 2 April 1991
Reno 911 - 2003 Baghdad 911 5-10 was released on: USA: 29 May 2008 Hungary: 1 April 2009