I see there is a mirror of www.classicshell.net
Thank you coddec.
It will come in handy when the original site goes down forever.
If one downloads an old user made .skin, .skin7 or .zip from this Github Archive,
for example, "Metro Glass.skin", the download file becomes "filed1f2.php".
It looks like the php file has to be renamed back to the original file name that's on the site.
Is there an easier way to download with the original file name?