The German TDS-HF can be downloaded here (pdf).
The German Thirst Distress Scale for patients with Heart Failure
Translated by Franziska Wefer, M.Sc.
Herz- und Diabeteszentrum NRW
Universitätsklinik der Ruhr-Universität Bochum
Georgstraße 11, 32545 Bad Oeynhausen, GERMANY
Email: fwefer@hdz-nrw.de