Not a (permanent) solution, just a very (very, very,…) stupid idea, that I am not even sure would work.
What happened? They don’t own the domains anymore, the DNS records were removed so those domains don’t resolve to anything. But maybe they could be locally resolved by each instance. I added these entries to my /etc/hosts file when the DNS records were deleted:
This allowed me access to FMHY (while it was still up).
Even if this worked, why would it be stupid? Well it would have to be manually set by each instance. And those IP addresses may change from time to time, so it would have to be manually updated again, by every instance.
A thanks for the IP addresses to dnshistory.org (fmhy.ml) and whoever wrote this comment: lemmy.fmhy.ml/comment/1231585 (lemmy.fmhy.ml)