Twin directories of libz:

[DIR]  ftp://ftp.gnome.org/mirror/debian-misc/debian-kfreebsd/pool-armel/main/libz/
[DIR]  ftp://208.209.50.19/pub/.vol02/NetBSD/NetBSD-release-3-1/src/sys/lib/libz/
[DIR]  ftp://ftp.estpak.ee/pub/NetBSD/NetBSD-release-3-1/src/sys/lib/libz/
[DIR]  ftp://ftp5.freebsd.org/pub/NetBSD/NetBSD-release-3-1/src/sys/lib/libz/
[DIR]  ftp://208.209.50.19/pub/.vol02/NetBSD/NetBSD-release-3-1/src/lib/libz/
[DIR]  ftp://208.209.50.19/pub/.vol02/NetBSD/NetBSD-release-3-1/src/sys/arch/hpc/stand/libz/
[DIR]  ftp://208.209.50.19/pub/.vol02/NetBSD/NetBSD-release-3-1/src/sys/arch/hpcmips/stand/libz/
[DIR]  ftp://ftp.estpak.ee/pub/NetBSD/NetBSD-release-3-1/src/lib/libz/
[DIR]  ftp://ftp5.freebsd.org/pub/NetBSD/NetBSD-release-3-1/src/lib/libz/
[DIR]  ftp://ftp.estpak.ee/pub/NetBSD/NetBSD-release-3-1/src/sys/arch/hpc/stand/libz/
[DIR]  ftp://ftp5.freebsd.org/pub/NetBSD/NetBSD-release-3-1/src/sys/arch/hpc/stand/libz/
[DIR]  ftp://ftp.estpak.ee/pub/NetBSD/NetBSD-release-3-1/src/sys/arch/hpcmips/stand/libz/
[DIR]  ftp://ftp5.freebsd.org/pub/NetBSD/NetBSD-release-3-1/src/sys/arch/hpcmips/stand/libz/
[DIR]  ftp://ftp.cesnet.cz/.vol/releases.ubuntulinux.org/ubuntu/pool/universe/libz/
[DIR]  ftp://ftp.cesnet.cz/.vol/releases.ubuntulinux.org/ubuntu/pool/main/libz/
[DIR]  ftp://ftp.linux.it/ubuntu/pool/universe/libz/
[DIR]  ftp://ftp.ural.ru/pub/mirrors/debian/pool/main/libz/
[DIR]  ftp://ftp.netbsd.org/pub/NetBSD/NetBSD-current/src/sys/lib/libz/
[DIR]  ftp://ftp.sk.freebsd.org/pub/NetBSD/NetBSD-current/src/sys/lib/libz/
[DIR]  ftp://ftp.mgts.by/pub/ubuntu/pool/universe/libz/
[DIR]  ftp://ftp.debian.de/debian-ports/pool-kfreebsd-i386/main/libz/
[DIR]  ftp://ftp.cosy.sbg.ac.at/debian/pool/main/libz/
[DIR]  ftp://ftp.ankara.edu.tr/ubuntu/pool/universe/libz/
[DIR]  ftp://ftp.nsu.ru/mirrors/ftp.freebsd.org/pub/FreeBSD/development/OpenBSD-CVS/src/sys/lib/libz/
[DIR]  ftp://ftp.nsu.ru/mirrors/ftp.freebsd.org/pub/FreeBSD/development/OpenBSD-CVS/src/sys/arch/sparc64/stand/libz/
[DIR]  ftp://ftp.nsu.ru/mirrors/ftp.freebsd.org/pub/FreeBSD/development/OpenBSD-CVS/src/sys/arch/i386/stand/libz/
[DIR]  ftp://ftp.nsu.ru/mirrors/ftp.freebsd.org/pub/FreeBSD/development/OpenBSD-CVS/src/sys/arch/sparc/stand/libz/
[DIR]  ftp://ftp.nsu.ru/mirrors/ftp.freebsd.org/pub/FreeBSD/development/OpenBSD-CVS/src/sys/arch/mvme88k/stand/libz/
[DIR]  ftp://ftp.nsu.ru/mirrors/ftp.freebsd.org/pub/FreeBSD/development/OpenBSD-CVS/src/sys/arch/mvmeppc/stand/libz/
[DIR]  ftp://ftp.nsu.ru/mirrors/ftp.freebsd.org/pub/FreeBSD/development/OpenBSD-CVS/src/sys/arch/sgi/stand/libz/
[DIR]  ftp://ftp.nsu.ru/mirrors/ftp.freebsd.org/pub/FreeBSD/development/OpenBSD-CVS/src/sys/arch/mvme68k/stand/libz/
[DIR]  ftp://ftp.nsu.ru/mirrors/ftp.freebsd.org/pub/FreeBSD/development/OpenBSD-CVS/src/sys/arch/hppa64/stand/libz/
[DIR]  ftp://ftp.nsu.ru/mirrors/ftp.freebsd.org/pub/FreeBSD/development/OpenBSD-CVS/src/sys/arch/hppa/stand/libz/
[DIR]  ftp://ftp.nsu.ru/mirrors/ftp.freebsd.org/pub/FreeBSD/development/OpenBSD-CVS/src/lib/libz/
[DIR]  ftp://ftp.nsu.ru/mirrors/ftp.freebsd.org/pub/FreeBSD/development/OpenBSD-CVS/src/sys/arch/hp300/stand/libz/
[DIR]  ftp://ftp.nsu.ru/mirrors/ftp.freebsd.org/pub/FreeBSD/development/OpenBSD-CVS/src/sys/arch/alpha/stand/libz/
[DIR]  ftp://ftp.nsu.ru/mirrors/ftp.freebsd.org/pub/FreeBSD/development/OpenBSD-CVS/src/sys/arch/aviion/stand/libz/
[DIR]  ftp://ftp.man.szczecin.pl/pub/FreeBSD/development/FreeBSD-CVS/src/lib/libz/
[DIR]  ftp://ftp.mtu.ru/.3/FreeBSD/development/FreeBSD-CVS/src/lib/libz/
[DIR]  ftp://ftp.gwdg.de/pub/FreeBSD/development/FreeBSD-CVS/src/lib/libz/
[DIR]  ftp://ftp.sk.freebsd.org/pub/FreeBSD/development/FreeBSD-CVS/src/lib/libz/
[DIR]  ftp://ftp.metu.edu.tr/pub/mirrors/ftp.freebsd.org/development/FreeBSD-CVS/src/lib/libz/
[DIR]  ftp://ftp.ucsd.edu/mirror2/FreeBSD/development/FreeBSD-CVS/src/lib/libz/
[DIR]  ftp://ftp.sfc.wide.ad.jp/pub/FreeBSD/development/FreeBSD-CVS/src/lib/libz/
[DIR]  ftp://ftp.uvsq.fr/pub/FreeBSD/development/FreeBSD-CVS/src/lib/libz/
[DIR]  ftp://ftp.uni-oldenburg.de/linux/ftp.debian.org/pool/main/libz/
[DIR]  ftp://ftp.sh.cvut.cz/cvsupd/prefixes/FreeBSD.cvs/src/lib/libz/
[DIR]  ftp://ftp.kaist.ac.kr/FreeBSD/development/FreeBSD-CVS/src/lib/libz/
[DIR]  ftp://ftp12.freebsd.org/pub/FreeBSD/development/FreeBSD-CVS/src/lib/libz/
[DIR]  ftp://ftp.cse.buffalo.edu/mirror/BSD/FreeBSD/development/FreeBSD-CVS/src/lib/libz/