You can find Chex Pack releases at
http://www.ifocserv.net/ftp/wads/
I recently found a better place to host my wads and pk3s -- Wuala
http://www.wuala.com/jwaffe/Hosted/
I've been hosting Chex Pack on my own FTP now
http://www.ifocserv.net/ftp/wads/
Unfortunately Wadseeker can't search it; I've been told it's because it's a FTP and not HTTP