Twin directories of ftp.w3.org:

[DIR]  ftp://ftp.kreonet.re.kr/tools/www/sunsite.uk/ftp.w3.org/
[DIR]  ftp://ftp.informatik.uni-hamburg.de/pub/soft/infosystems/www/ftp.w3.org/
[DIR]  ftp://ftp.gwdg.de/pub/misc/ftp.w3.org/
[DIR]  ftp://ftp.funet.fi/.m/mirrors2/ftp.w3.org/
[DIR]  ftp://nic.funet.fi/.m/mirrors2/ftp.w3.org/