[Buildroot] Bad aterisk url

wget --passive-ftp -P /home/grhuser/buildroot/dl
http://www.zlib.net//zlib-1.2.3.tar.bz2
--14:48:33--  http://www.zlib.net//zlib-1.2.3.tar.bz2
          => `/home/grhuser/buildroot/dl/zlib-1.2.3.tar.bz2'
Resolving www.zlib.net... 69.73.181.135
Connecting to www.zlib.net|69.73.181.135|:80... failed: No route to host.
make: *** [/home/grhuser/buildroot/dl/zlib-1.2.3.tar.bz2] Error 1

Checked the url myself. It is a dead link. Is there an alternative to this.
Searched the archives and did not find one.

http://prdownloads.sourceforge.net/libpng/zlib-1.2.3.tar.bz2 

Best Regards
Ulf Samuelsson                ulf at atmel.com