You are echo-ing the thoughts of @StephenLead on GeoNet in a thread titled Please restore ArcScripts:
Anyone trying to visit http://arcscripts.esri.com is redirected to
ArcGIS Code Sharing - but the old content from ArcScripts has not been
ported across.
I get that ArcScripts is no longer active, but this does not mean that
all of the content on ArcScripts is useless. There is many YEARS'
worth of user contributions on ArcScripts, which will be lost if this
resource is removed.
Esri - can you please remove the redirect on
http://arcscripts.esri.com and just include a note telling people to
check ArcGIS Code Sharing for up-to-date code?
which was responded to by Jim Barry of Esri:
Ok folks, here's something else long overdue. The link below is a
spreadsheet that contains a listing of the contents of the ArcScripts
database when it was frozen in 2010 and pulled offline in 2016. If you
see something in there you want, let me know (reply here, or direct
message, or email jbarry at esri), or anyone in Tech Support. We can
get it for you. The first column is the "Dbid" of the item which helps
us find the item by filename. Also important to know that items
between 13022-15629 are currently missing for reasons that might be
related to why we needed to pull it down in 2016, as are some others
in the list if they were deleted by the owner at some point after
uploading them.
https://dl.dropboxusercontent.com/u/26206155/share/ArcScripts_Items.xlsx
Unfortunately, as commented by @whuber:
Jim Barry's link goes to a "File Not Found" page
To address that I recommend contacting Jim via the above thread.