Twin directories of 6.3:

[DIR]  ftp://ftp.nsu.ru/mirrors/ftp.freebsd.org/pub/FreeBSD/releases/amd64/ISO-IMAGES/6.3/
[DIR]  ftp://ftp.nsu.ru/mirrors/ftp.freebsd.org/pub/FreeBSD/releases/i386/ISO-IMAGES/6.3/
[DIR]  ftp://ftp.duth.gr/pub/FreeBSD/releases/amd64/ISO-IMAGES/6.3/
[DIR]  ftp://ftp.duth.gr/pub/FreeBSD/releases/i386/ISO-IMAGES/6.3/
[DIR]  ftp://ftp.duth.gr/pub/FreeBSD/releases/powerpc/ISO-IMAGES/6.3/
[DIR]  ftp://ftp.duth.gr/pub/FreeBSD/releases/pc98/ISO-IMAGES/6.3/
[DIR]  ftp://ftp.duth.gr/pub/FreeBSD/releases/sparc64/ISO-IMAGES/6.3/
[DIR]  ftp://ftp.duth.gr/pub/FreeBSD/releases/alpha/ISO-IMAGES/6.3/
[DIR]  ftp://ftp.cs.rose-hulman.edu/FreeBSD/releases/i386/ISO-IMAGES/6.3/
[DIR]  ftp://130.75.2.80/pub/mirror/tcl/mirror/ftp.procplace.com/sorted/packages-8.0/apps/moodss/6.3/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/tcl/mirror/ftp.procplace.com/sorted/packages-8.0/apps/moodss/6.3/
[DIR]  ftp://130.75.2.80/pub/mirror/tcl/mirror/ftp.procplace.com/sorted/apps/moodss/6.3/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/tcl/mirror/ftp.procplace.com/sorted/apps/moodss/6.3/
[DIR]  ftp://ftp.am-utils.org/mirrors/os/FreeBSD/releases/i386/ISO-IMAGES/6.3/
[DIR]  ftp://ftp.sh.cvut.cz/storage/1/lfs-website/blfs/downloads/6.3/
[DIR]  ftp://ftp.sh.cvut.cz/storage/1/lfs-website/blfs/view/6.3/
[DIR]  ftp://ftp.sh.cvut.cz/storage/1/lfs-website/blfs/errata/6.3/
[DIR]  ftp://ftp.cns.vt.edu/pub/remedy/6.3/
[DIR]  ftp://ftp.rmt.ru/.1/ftp.freebsd.org/pub/FreeBSD/releases/powerpc/ISO-IMAGES/6.3/
[DIR]  ftp://ftp.radio-msu.net/.1/ftp.freebsd.org/pub/FreeBSD/releases/powerpc/ISO-IMAGES/6.3/
[DIR]  ftp://ftp.jpix.ad.jp/pub/FreeBSD/releases/alpha/ISO-IMAGES/6.3/
[DIR]  ftp://ftp.jpix.ad.jp/pub/FreeBSD/releases/amd64/ISO-IMAGES/6.3/
[DIR]  ftp://ftp.jpix.ad.jp/pub/FreeBSD/releases/i386/ISO-IMAGES/6.3/
[DIR]  ftp://ftp.jpix.ad.jp/pub/FreeBSD/releases/pc98/ISO-IMAGES/6.3/
[DIR]  ftp://ftp.jpix.ad.jp/pub/FreeBSD/releases/powerpc/ISO-IMAGES/6.3/
[DIR]  ftp://ftp.jpix.ad.jp/pub/FreeBSD/releases/sparc64/ISO-IMAGES/6.3/
[DIR]  ftp://ftp.dei.uc.pt/pub/linux/kernel/people/trini/patches/gdb/6.3/
[DIR]  ftp://ftp.sh.cvut.cz/storage/1/lfs-website/lfs/errata/6.3/
[DIR]  ftp://64.50.236.52/.1/blfs/6.3/
[DIR]  ftp://64.50.238.52/.1/blfs/6.3/
[DIR]  ftp://62.141.58.93/pub/blfs/6.3/
[DIR]  ftp://ftp.physics.uvt.ro/pub/FreeBSD/releases/amd64/ISO-IMAGES/6.3/
[DIR]  ftp://ftp.modulabbs.net/pub/freebsd/iso/6.3/
[DIR]  ftp://ftp.wh8.tu-dresden.de/pub/cert.dfn/vendor/sgi/Patches/6.3/
[DIR]  ftp://61.201.152.201/pub/FreeBSD-jp/mergemaster/6.3/
[DIR]  ftp://ftp.physics.uvt.ro/pub/FreeBSD/releases/alpha/ISO-IMAGES/6.3/
[DIR]  ftp://ftp.physics.uvt.ro/pub/FreeBSD/releases/pc98/ISO-IMAGES/6.3/
[DIR]  ftp://ftp.physics.uvt.ro/pub/FreeBSD/releases/sparc64/ISO-IMAGES/6.3/
[DIR]  ftp://ftp.physics.uvt.ro/pub/FreeBSD/releases/ia64/ISO-IMAGES/6.3/
[DIR]  ftp://ftp.physics.uvt.ro/pub/FreeBSD/releases/powerpc/ISO-IMAGES/6.3/
[DIR]  ftp://196.12.10.6/pub/FreeBSD/releases/i386/ISO-IMAGES/6.3/
[DIR]  ftp://ftp.polytechnic.edu.na/pub/FreeBSD/releases/i386/ISO-IMAGES/6.3/
[DIR]  ftp://ftp.sympad.net/pub/FreeBSD/6.3/
[DIR]  ftp://ftp.gazi.edu.tr/mirrors/FreeBSD/releases/alpha/ISO-IMAGES/6.3/
[DIR]  ftp://ftp.gazi.edu.tr/mirrors/FreeBSD/releases/amd64/ISO-IMAGES/6.3/
[DIR]  ftp://ftp.gazi.edu.tr/mirrors/FreeBSD/releases/i386/ISO-IMAGES/6.3/
[DIR]  ftp://ftp.gazi.edu.tr/mirrors/FreeBSD/releases/pc98/ISO-IMAGES/6.3/
[DIR]  ftp://ftp.gazi.edu.tr/mirrors/FreeBSD/releases/powerpc/ISO-IMAGES/6.3/
[DIR]  ftp://ftp.gazi.edu.tr/mirrors/FreeBSD/releases/sparc64/ISO-IMAGES/6.3/
[DIR]  ftp://ftp.gazi.edu.tr/pub/FreeBSD/releases/alpha/ISO-IMAGES/6.3/