Content Paradise never stated that the downloads would stay up forever. As EFStarlet stated, they always guaranteed only 30 days. 

For people who did not backup the original  ZIPs, there is still time to re-download everything and put it a safe place. 

A ship in port is safe; but that is not what ships are built for.
Sail out to sea and do new things.
-"Amazing Grace" Hopper

Avatar image of me done by Chidori.