If you can’t find them on Telegram, there isn’t much else. If you already are in the private tracker scene you can try to get into Materize but invites may be tricky grab.

Those ones are fun. If you delete an SSL certificate and haven’t removed it from a proxy, the entire container goes down and you have to trawl through logs to find what went wrong.

Hoarder has just released support for SingleFile also. You can set Hoarder as a save location in the SingleFile extension.

Best of luck. What do you find lacking so far?