Are you looking for muessigb.net? I have closed the site and started a new website here. If you miss something or would like to have a look at the old site, it is available again, here: http://legacy.bmuessig.eu/www/
If you are looking for a complete listing of the backed-up resources of the old site, they are available here: http://legacy.bmuessig.eu/
Old links to muessigb.net should be altered to point to the new site's contents or (if really necessary) to the respective resource in the backup site. Altering the links is easy, as the directories and structures on the backup site are kept intact.