We've had new sites since then -
https://www.joyofsatan.org
- http://joyofsatan.com
https://satanisgod.org
https://satanslibrary.org
http://exposingchristianity.com
http://666blacksun.com
https://kabbalahexposed.com
http://gbltthulesociety666.angelfire.com/about
https://exposingthelieofislam.wordpress.com
https://www.evilgoy.com
https://groups-archive.com [down currently; visit this link (which is a bit out-of-date now, but topics are still covered on this forum) to download it, if it is safe for you to do so - https://mega.nz/#F!vzQ0QATD!G91quBFThyEjXpOmw4BwRw]
This groups-archive site is an archive of threads and posts from Yahoo! Groups. As you might know, Yahoo! is gong to kill the Groups soon, so stay on this forum instead!
You can also download the Joy of Satan Encyclopaedia, which is recent, as well -
https://ancient-forums.com/viewtopic.php?f=24&t=25002
You can also check HPHC's signature for the current online status of the sites. The current link to check them is
https://uptime.theyknow.in/uptime.html
but that might change, so keep an eye on HPHC's signature.