Email Krause by going to http://www.krause-systems.co.uk/contact.html. Fill out the contact form, including your preferred contact information (email or phone). Submit the form, and a Krause representative will contact you.
Telephone Krause at 49 (0) 6631 / 795 -- 0. If you are calling from the United States, dial all of the numbers shown here. When your call is answered, ask if the representative speaks English by saying "Sprechen Sie Englisch?" (pronounced "Sprek-en Zee English"). If the person answering the phone does not speak English, he will transfer you to some one who does.
Write Krause at KRAUSE-Werk GmbH & Co. KG, Industriegebiet Altenburg, Kreuzweg 3, DE-36304 Alsfeld, Germany. You will want to send any written correspondence by Air Mail to ensure that it gets there quickly. The post office can provide Air Mail stickers and tell you how much postage your letter will require.