Ferrite Rod site monitored?

[jjjman321]

Is https://www.ferrite-rod-antennas.de/ (the ferrite rod purchase site) still active/monitored? The documentation updates suggest it's still active, but I send a message about buying a week or two ago and haven't heard back.

Barring this, I can't seem to find documentation on making my own. Can someone kindly point to instructions or have some tips?

Thanks!