I just reached Mr. Horneber using the phone number given in his website, no problem.
Mr. Horneber said his email address has been changed, so please try again with this:
info@huelsen-horneber.de

Further he said that he is not distributing via Huntingtons any more (are they out of business?), but direct shipment from Germany is somewhat complicated and costly - thanks to your previous government...

Regards fuhrmann